This is Module 8 for Quarter 1 of the Special Program in Technical Vocational Education (SPTVE), Automotive Servicing NC II, Grade 10. It is titled “Testing and Repairing Wiring/Lighting System (Installing Wiring/Lighting System)” and was prepared by DepEd Cordillera Administrative Region as a self-learning module for home study. After working through it, learners can read the wiring diagrams of a vehicle’s lighting and warning circuits and draw and connect those circuits themselves.
What learners will learn
The module is for Quarter 1, Week 8. It covers the learning competency LO 2. Install Wiring/Lighting System (code TLE_IAAUS9-12TRW-IIIe-g-11). After going through it, learners are expected to:
- interpret a lighting system circuit diagram;
- draw and connect different lighting system circuits; and
- recognize the possible advantages of knowing how to interpret and install lighting connections.
Reading lighting circuit diagrams
The module first introduces the symbols used in its diagrams. These include the battery, ammeter, ignition switch (with positions AM, ST, ACC, and IGN), fuse box, flasher relay, hazard switch, horn and horn switch, courtesy, dome, and back-up light switches, and ground.
It then compares two types of lighting circuit:
- Conventional type: used in older vehicles. It is obsolete but can still be seen in some old vehicles.
- Steering column switch type: used in modern vehicles. It is easier to operate.
Using the steering column headlamp switch
| Switch position | What happens |
|---|---|
| 1 (OFF) | Side marker, parking, tail, license plate, and panel lights and the headlights turn off |
| 2 | Side marker, parking, tail, license plate, daytime running lights (if equipped), and instrument panel lights turn on |
| 3 | The headlights and all the lights above, except the daytime running lights, turn on |
The lever also selects the beam. The center position gives low beam, the downward position gives high beam, and the upward position gives beam pass.
The eight circuits in this module
Every circuit starts with the same parts: a battery, ammeter, ignition switch, fuse box with fuses, and related wiring. Most also use a relay. The Bosch relay in the diagrams has terminals 30, 85, 86, and 87. What changes from circuit to circuit is the switch and the lamp or device.
The module also explains two kinds of connection:
- A controlled connection works only when the ignition key is on. If the key is in the lock position, the lamps stay off even when their switch is turned on.
- A not controlled connection works even when the ignition key is in the lock position.
| Circuit | Main switch and device | Connection |
|---|---|---|
| Headlight | Headlight control switch, Bosch relay, headlamps | Not controlled |
| Park, tail, and license plate light | Park and tail light switch, relays, park, tail, and plate lamps | Controlled |
| Brake/stop light | Brake (stop) light switch, relay, brake lamp | Not controlled |
| Back-up light | Back-up light switch, Bosch relay, back-up lamp | Controlled |
| Dome light | Dome light switch, Bosch relay, dome lamp | Not controlled |
| Courtesy light | Courtesy light switch, Bosch relay, courtesy lamp | Not controlled |
| Horn | Horn switch, relay, horns | Not controlled |
| Hazard and signal light | Hazard switch, signal switch, flasher relay, turn signal and indicator bulbs | Turn signal is controlled; hazard is not controlled |
Some useful details from the lessons:
- Headlight wiring differs by vehicle brand. Identify the headlight terminals first with a test lamp, then choose the matching diagram. The module gives two headlight diagrams based on which terminals share a common supply. You may also add separate Bosch relays for the high and low lamps.
- Park and tail lights share one switch. The first turn of that switch turns on the park and tail lights.
- The stop light switch is installed at the brake pedal. The back-up light switch turns on the back-up light when the transmission is shifted into reverse.
- There are two hazard and signal diagrams. Diagram 1 uses a single flasher, with the hazard switch on the steering column (ON, OFF, and common terminals). Diagram 2 uses a double flasher with a toggle hazard switch.
- Lamps are assumed to be grounded automatically in the diagrams. The turn signal indicator is not shown.
How to use this module
The module follows the usual parts of a DepEd self-learning module:
- What I Know: a 15-item pretest (multiple choice and identification). Answer it before the other parts.
- What’s In: a word search for five words related to wiring.
- What’s New: describe a wiring diagram.
- What Is It: the lessons on symbols and the eight circuits.
- What’s More: draw and connect a circuit on a blank layout.
- What I Have Learned: explain the advantages of knowing how to interpret and install lighting connections.
- What I Can Do: copy and connect the vehicle circuits. Leave out the dome, courtesy, side marker, stop, and back-up light circuits.
- Post-Assessment: a 15-item test.
- Additional Activity: list the parts of the stop, reverse, dome, and courtesy light circuits.
For learners: Write all answers on a separate sheet, not on the module. Finish each task before moving on, and check your work honestly with the answer key. Return the module to your teacher when you are done.
For parents and guardians: You are your child’s main support at home. Remind them to use separate answer sheets and to ask the teacher when a task is unclear.
For teachers and facilitators: Orient learners on how to use the module and track their progress. The answer key covers the pretest, post-test, word search, and additional activity. It also includes sample connections for the What I Can Do task.
Frequently asked questions
What grade and quarter is this Automotive Servicing module for?
It is for Grade 10 learners in the Special Program in Technical Vocational Education (SPTVE), Automotive Servicing NC II. It is Module 8 for Quarter 1, Week 8.
What is the difference between a controlled and a not controlled connection?
A controlled connection works only when the ignition key is on, such as the park, tail, plate, back-up, and turn signal lights. A not controlled connection works even with the key in the lock position, such as the headlight, stop light, dome light, courtesy light, horn, and hazard light.
What are the terminals of the Bosch relay?
The module identifies the Bosch relay terminals as 30, 85, 86, and 87.
Does the module have an answer key?
Yes. It includes answers for the pretest, post-test, word search, What’s New, and Additional Activity. It also has sample wiring connections for the What I Can Do task.
What circuits does the module cover?
It covers eight circuits: headlight; park, tail, and license plate light; brake/stop light; back-up light; dome light; courtesy light; horn; and hazard and signal light.
Full text of the module
The text below is a transcription of the PDF above, as printed.
Special Program in Technical Vocational Education
Quarter 1 – Module 8 Testing and Repairing Wiring/Lighting System (Installing wiring/lighting system)
Automotive Servicing NC II
[illustration: learners studying at home, outdoors, and at a table with a globe and a lamp]
CO_Q1_TLE 10_Module 8
[transcriber’s note: this page repeats the cover text of page 1 (the number 10, the title “Special Program in Technical Vocational Education”, “Quarter 1 – Module 8 Testing and Repairing Wiring/Lighting System”, “(Installing Wiring/Lighting System)”, and “Automotive Servicing NC II”). The text is not repeated here.]
IA-Automotive Servicing NCI – Grade 10 Alternative Delivery Mode Quarter 1 – Module 8. Installing Wiring/Lighting System
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education Secretary: Leonor Magtolis Briones Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writer: Pablo B. Mariacos & Aldrin T. Bongsian Editors: Reviewer: Jonalyn C. Ambrona Mary Jane N. Malihod Illustrator: Layout Artist: Management Team: Estela Leon-Cariño Carmel F. Meris Rosita C. Agnasi Marie Carolyn B. Verano Christopher C. Benigno Juliet C. Sannad Mary Jane N. Malihod Armi Victoria Fiangaan Brenda M. Cariño
Printed in the Philippines by:
Department of Education – Cordillera Administrative Region
Office Address: Wangal, La Trinidad, Benguet Telefax: (074) -422 -4074 E-mail Address: car@deped.gov.ph
Introductory Message
This Self-Learning Module (SLM) is prepared so that you, our dear learners, can continue your studies and learn while at home. Activities, questions, directions, exercises, and discussions are carefully stated for you to understand each lesson.
Each SLMS is composed of different parts. Each part shall guide you step-by-step as you discover and understand the lesson prepared for you.
Pre-tests are provided to measure your prior knowledge on lessons in each SLM. This will tell you if you need to proceed on completing this module or if you need to ask your facilitator or your teacher’s assistance for better understanding of the lesson. At the end of each module, you need to answer the post-test to self-check your learning. Answer keys are provided for each activity and test. We trust that you will be honest in using these.
In addition to the material in the main text, Notes to the Teacher are also provided to our facilitators and parents for strategies and reminders on how they can best help you on your home-based learning.
Please use this module with care. Do not put unnecessary marks on any part of this SLM. Use a separate sheet of paper in answering the exercises and test. And read the instructions carefully before performing each task.
If you have questions in using this SLM or any difficulty in answering the tasks in this module, do not hesitate to consult your teacher or facilitator.
Thank you.
Notes to the Teacher
This contains helpful tips or strategies that will help you in guiding the learner.
For the facilitator:
Hi, as a facilitator you are expected to orient the learners on how to use this module. You also need to keep track of the learners’ progress while allowing them to manage their own learning. Kindly, advise the learner’s parents or guardians of the same procedure since they will be the primary supporters in the learners’ progress. Please, do not forget to remind the learner to use separate sheets in answering all of the activities found in the learning module
For the learner:
Hello learner, Welcome to the Automotive Servicing NC II Alternative Delivery Mode (ADM) Module on Installing Wiring/Lighting System. We hope you are ready to progress in your Grade 10 SPTVE in automotive servicing with this learning module. This is designed to provide you with interactive tasks to further develop the desired learning competencies prescribed in our curriculum. With this, you are expected to appreciate staking through the information and activity given.
This module has the following parts and corresponding icons:
[transcriber’s note: the ICON column holds a small icon for each part; the icons are not transcribed.]
| ICON | LABEL | DETAIL |
|---|---|---|
| What I Need to Know | This contains the learning objectives which you need to accomplish. | |
| What I Know | This evaluates what you know about the lesson you are to learn. | |
| What’s In | This connects the current lesson with a topic necessary in your understanding. | |
| What’s New | This introduces the lesson through an activity. | |
| What Is It | This contains a brief discussion of the learning module lesson. | |
| What’s More | These are activities to check your understanding of the lesson. | |
| What I Have Learned | This summarizes the important ideas presented in the lesson. | |
| What I Can Do | This is a real-life application of what you have learned. | |
| Assessment | This is a post assessment of what you have learned. | |
| Additional Activity | This is an activity that will strengthen your knowledge about the lesson. |
At the end of this module, you will also find:
References: This is a list of all sources used in developing this module.
TABLE OF CONTENTS
What I Need to Know ….. 1 What I Know ….. 2 What’s In ….. 4 What’s New ….. 4 What Is It ….. 5 What I Have Learned ….. 16 What I Can Do ….. 17 Post-Assessment ….. 18 Additional Activity ….. 20 Answer Key ….. 21 References ….. 21
LESSON 8 Applying Basic Safety Procedure
The following are some reminders in using this module:
- Use the module with care. Do not put unnecessary mark/s on any part of the module. Use a separate sheet of paper in answering the exercises.
- Don’t forget to answer What I Know before moving on to the other activities included in the module.
- Read the instruction carefully before doing each task.
- Observe honesty and integrity in doing the tasks and checking your answers.
- Finish the task at hand before proceeding to the next.
- Return this module to your teacher/facilitator once you are through with it.
If you encounter any difficulty in answering the tasks in this module, do not hesitate to consult your teacher or facilitator. Always bear in mind that you are not alone.
We hope that through this material, you will experience meaningful learning and gain deep understanding of the relevant competencies. You can do it!
What I Need to Know
This module was designed and written to guide you to acquire the learning competencies and develop your skills in applying basic safety procedure. The scope of this module permits it to be used in many different learning situations. The language used recognizes the diverse vocabulary level of students. The lessons are arranged to follow the standard sequence of the course. However, the order in which you read the module can be changed to correspond with the textbook you are now using.
Quarter/Week: Q1/8 Learning Competency Code: TLE_IAAUS9-12TRW-IIIe-g-11 Learning Competency: LO 2. Install Wiring/Lighting System.
Learning Objectives: After going through this module, you are expected to:
- interpret lighting system circuit diagram;
- draw and connect different lighting system circuits, and;
- recognize the possible advantages in knowing how to interpret and install lighting connections.
What I Know
Pre-Test/Assessment
I-Multiple Choice
Direction: Choose the LETTER of the best answer and write in the answer sheet.
Switch that is used in a back-up light circuit that switches the back-up light when transmission is shifted in reverse.
a. back-up light switch
b. directional light switch
c. headlight switch
d. park lightsHeadlight is a _____ connection.
a. controlled
b. not controlled
c. unknown
d. none of the aboveThe circuits in the vehicle include all, except what?
a. battery
b. lamps
c. switch
d. none of the aboveThe components of horn circuit are the following except?
a. battery
b. bulb
c. fuse
d. relayWhere does the stop light switch installed?
a. brake pedal
b. engine
c. steering column
d. transmissionThe terminal of the Bosch relay are_____?
a. terminal 30, 85, 86 & 87
b. terminal 30, 80, 86 & 87
c. both a & b
d. none of theseIf you shift the transmission into reverse position, what happen to the rear light?
a. back-up light will switch on
b. signal light will switch on
c. stop light will switch on
d. tail light will switch onA switch that is used in the brake light circuit?
a. back-up light switch
b. signal light switch
c. stop light switch
d. tail light switchIn horn circuit, what do we call the switch that is operated by the driver to apply horn?
a. back-up light switch
b. horn switch
c. stop light switch
d. tail light switchThe type of circuit connection that is obsolete but still can be seen in some old vehicles.
a. conventional c. both A and B
b. steering column d. none of the above
II- Identification
Directions: For numbers 11-15, identify what type of circuit diagram that each component belongs? Choose from the following;
- A. Back-up Light Circuit
- B. Horn Circuit
- C. Signal and Hazard Circuit
- D. All electrical circuit
Write your answer in the answer sheet. Answers may be repeated.
| Item | Picture |
|---|---|
| 11. | [illustration: circular flasher relay diagram with terminals labeled P, X, and L] |
| 12. | [illustration: horn] |
| 13. | [illustration: fuse box with fuses and red and orange wiring] |
| 14. | [illustration: ammeter symbol with – and + terminals; printed label: Ammeter (upside down)] |
| 15. | [illustration: line drawing of a vehicle component with a housing and a pointed part] |
What’s In
Word Search
Directions: Look for the 5 words that are related to wiring system. Write your answer in the answer sheet.
| H | C | T | I | W | S | T | H | G | I | L | L | A | N | G | I | S | H |
| W | S | C | B | G | H | E | R | I | D | S | R | E | A | T | W | Q | C |
| A | S | F | X | V | G | R | C | Y | T | U | E | A | B | F | I | J | T |
| F | T | F | P | H | M | A | S | O | I | L | H | Z | U | I | S | G | I |
| T | V | R | D | F | I | P | D | P | U | L | S | X | Y | J | I | D | W |
| E | K | F | U | S | E | O | F | B | Y | K | A | C | T | H | H | V | S |
| U | H | E | P | W | F | I | A | M | T | H | L | V | E | G | U | X | D |
| S | W | R | T | S | T | T | G | N | R | J | F | N | R | F | Y | S | R |
| I | B | A | E | R | T | U | H | V | E | G | L | B | W | Y | T | T | A |
| G | A | U | A | E | Q | Y | J | C | W | F | J | M | E | D | E | H | Z |
| N | Y | F | R | O | W | T | K | X | Q | D | H | K | Q | S | W | V | A |
| A | G | Y | Y | L | E | R | L | Z | A | S | G | D | A | W | Q | E | H |
What’s New
Direction: Describe what was the illustration all about?
[chart: wiring diagram; horn circuit with two horns, a battery, an ammeter, an ignition switch, a fuse box, a relay, and a horn switch on the steering wheel]
Labels printed in the chart: Ammeter; Ignition switch; relay terminals 87, 86, 85, 30.
What Is It
INTERPRETING LIGHTING AND WARNING CIRCUIT DIAGRAM
Before proceeding to the different automotive lighting circuits, familiarize first the following pictures or symbols for it easy interpretation/ understanding of the topic.
| Item | Symbol | Symbol | |
|---|---|---|---|
| 1. | [illustration: battery symbol] Battery | [illustration: flasher relay symbol] Flasher Relay | |
| 2. | [illustration: ammeter symbol] Ammeter | [illustration: hazard switch] Hazard Switch | |
| 3. | [illustration: ignition switch diagram with positions AM, ST, ACC, IGN] Ignition Switch | [illustration: horn] Horn | |
| 4. | [illustration: fuse box with fuses] Fuse Box with fuses | [illustration: horn switch on steering wheel] Horn Switch | |
| [illustration: courtesy light switch] Courtesy light switch | [illustration: dome light switch] Dome light switch | ||
| [illustration: back-up light switch] Back-up light switch | [illustration: ground symbol] Ground |
Introduction
Lighting system circuit diagram has two types, the conventional type which was used by the ancient vehicles and the steering column switch type that is now being used in modern vehicles. Their difference is that steering column switch type is easy to operate unlike in conventional type.
[chart: wiring diagram; Example of Conventional Type Switch used in Headlight Circuit]
Labels printed in the chart: Dimmer Switch (H B L); Light Switch (H P B); Fuse; Ignition Switch (B, ST, IG, ACC); BATTERY (+) (-).
Example of Conventional Type Switch used in Headlight Circuit
[chart: wiring diagram; Example of Steering Column Type Switch used in Headlight Circuit]
Labels printed in the chart: Ignition switch; Ammeter; Common, High, Low, Pass; Common, 1st Turn, 2nd Turn; relay terminals 87, 86, 85, 30; RIGHT; LEFT.
Example of Steering Column Type Switch used in Headlight Circuit
1. HEADLIGHT CIRCUIT
Headlight circuit is basically consiting of a battery, ammeter, ignition switch, fuse box with fuses, headlight control switch, bosch relay, headlamp and related wirings.
Depending on the brand of the vehicle, headlight circuit diagram may have different wiring connection. If not sure on the connection of the headligh, you may refer on the following diagram below but headlight terminals must be first identified.
[chart: wiring diagram; Pictorial diagram of a headlight circuit]
Labels printed in the chart: Ignition switch; Ammeter; Common, High/Pass, Low, 2nd Turn; 1ST Turn, Common; relay terminals 87, 86, 85, 30; RIGHT (HI, LO); LEFT (HI, LO).
Pictorial diagram of a headlight circuit
NOTE: This type of connection is used when the following terminals are combined when being tested using a test lamp;
- 2nd turn, low, high/pass has a common source or supply.
- High and pass is combined.
- Headlight is a not controlled connection meaning, headlight may be turned or switched on even the ignition key is in lock position.
Pictorial diagram of headlight circuit
[chart: wiring diagram; Pictorial diagram of headlight circuit]
Labels printed in the chart: Ignition switch; Ammeter; Common, High, Low, Pass; Common, 1st Turn, 2nd Turn; relay terminals 87, 86, 85, 30; RIGHT; LEFT.
Pictorial diagram of headlight circuit
NOTE: This type of connection is used when the following terminals are combined when being tested using a test lamp;
- high, low and pass terminals has a common source or supply.
- 1st turn and 2nd turn has a common source or supply.
You may also add separated bosch relays for the high and low lamps.
Use of Headlamp Switch in a Steering Column Type Switch
[illustration: steering column light switch being turned, with numbered positions 1, 2, and 3]
[illustration: steering column switch positions 1 to 3 and the lever for high beam, low beam, and beam pass]
| Position | Description |
|---|---|
| 1 OFF | The side marker, parking, tail, license plate, panel board, headlight turn off |
| 2 | The side marker, parking, tail, license plate, daytime running lights (if equipped) and instrument panel lights turn on |
| 3 | The headlights and all lights listed above (except daytime running lights) turn on. |
Turning high beam, low beam, beam passes headlights
- Center position – low beam
- Downward position – high beam
- Upward position – beam pass
[illustration: hand turning the lever on the steering column to 1 and 2 positions]
2. PARK, TAIL, AND LICENSE PLATE LIGHT CIRCUIT
Park and tail light circuit is basically consisting of a battery, ammeter, ignition switch, fuse box with fuses, park and tail light switch, relays, park lamp, tail lamp, license plate lamp and related wirings.
[chart: wiring diagram; Pictorial diagram of Park and Tail Light]
Labels printed in the chart: Signal; Tail Stop; Back-up; Plate Light; Back-up; Stop Tail; Signal; Park; Park; Ignition switch; Ammeter; Common, High/Pass, Low, 2nd Turn; 1ST Turn, Common; relay terminals 87, 86, 85, 30.
Printed note in the chart: Park and Tail light has the same switch, the first turn using this switch will switch on the park and tail light.
Pictorial diagram of Park and Tail Light
Note:
- Assuming that park and tail lamp is automatically grounded.
- Park, tail and plate lamp is a Controlled Connection meaning, once the ignition key is in lock position these lamps won’t illuminate even though the control switch is being turned or switched on.
3. BRAKE/STOP LIGHT CIRCUIT
Brake circuit is basically consisting of a battery, ammeter, ignition switch, fuse box with fuses, brake light switch, relay, brake lamp and related wirings.
[chart: wiring diagram; Pictorial Diagram of Stop/Brake Light Circuit] Labels printed: SIGNAL; TAIL STOP; BACK-UP; BACK-UP; TAIL STOP; SIGNAL; Ignition switch (AM, ST, ACC, IGN); Ammeter; relay terminals 87, 86, 85, 30; battery (+, −).
Pictorial Diagram of Stop/Brake Light Circuit
Note:
- Assuming that stop light is automatically grounded.
- Brake/Stop light is a not controlled connection.
4. BACK-UP LIGHT CIRCUIT
Back-up light circuit is basically consisting of a battery, ammeter, ignition switch, fuse box with fuses, bosch relay, back-up light switch, back-up lamp and related wirings.
[chart: wiring diagram; Pictorial diagram of back-up light circuit] Labels printed: Signal; Tail Stop; Back-up; Back-up; Tail Stop; Signal; Ignition switch (AM, ST, ACC, IGN); Ammeter; relay terminals 87, 86, 85, 30; battery (+, −).
Pictorial diagram of back-up light circuit.
Note:
- Assuming that back-up lamp is automatically grounded.
- Back-up light is a controlled connection.
5. DOME LIGHT
Dome light circuit is basically consisting of a battery, ammeter, ignition switch, fuse box with fuses, bosch relay, dome light switch, dome lamp and related wirings.
[chart: wiring diagram; Pictorial diagram of dome light circuit] Labels printed: DOOM LIGHT; Ignition switch (AM, ST, ACC, IGN); Ammeter; relay terminals 87, 86, 85, 30; battery (+, −).
Pictorial diagram of dome light circuit.
Note:
Dome light is automatically grounded
Dome light is a not controlled connection
6. COURTESY LIGHT CIRCUIT
Courtesy light circuit is basically consisting of a battery, ammeter, ignition switch, fuse box with fuses, bosch relay, courtesy light switch, courtesy lamp and related wirings.
[chart: wiring diagram; Pictorial diagram of a courtesy light circuit] Labels printed: COURTESY LIGHT; Ignition switch (AM, ST, ACC, IGN); Ammeter; relay terminals 87, 86, 85, 30; battery (+, −).
Pictorial diagram of a courtesy light circuit.
Note:
- Assuming that courtesy light is automatically grounded.
- Courtesy light is a not controlled connection.
7. HORN CIRCUIT
Horn circuit is basically consisting of a battery, ammeter, ignition switch, fuse box with fuses, relay, horn switch, horns and related wirings.
[chart: wiring diagram; Pictorial diagram of a horn circuit] Labels printed: Ignition switch (AM, ST, ACC, IGN); Ammeter; relay terminals 87, 86, 85, 30; battery (+, −).
Pictorial diagram of a horn circuit.
Note: Horn is a not controlled connection.
8. HAZARD AND SIGNAL LIGHT CIRCUIT
Hazard and signal circuit is basically consisting of a battery, ammeter, ignition switch, fuse box with fuses, hazard switch, signal switch, flasher relay, turn signal bulbs, indicator bulbs and related wirings.
DIAGRAM 1
[chart: wiring diagram; Pictorial diagram of signal and hazard circuit connection] Labels printed: Signal; Tail Stop; Back-up; Back-up; Tail Stop; Signal; Ignition switch (AM, ST, ACC, IGN); Ammeter; COMMON, LEFT, RIGHT; Hazard Switch with terminals on, off, common; flasher terminals P, X, L; SIGNAL; SIGNAL; battery (+, −).
Pictorial diagram of signal and hazard circuit connection.
Note:
- This kind of signal and hazard circuit connection is used when hazard switch is attached into the steering column with the following terminals- ON, OFF and common source or supply of ON and OFF, when being tested using a test lamp.
- Single flasher.
- Assuming that signal lamps are automatically grounded.
- Turn signal indicator was not included in the diagram
- Turn signal light is a controlled connection while hazard light is a not controlled connection.
DIAGRAM 2
[chart: wiring diagram; Pictorial diagram of signal and hazard circuit connection] Labels printed: Signal; Tail Stop; Back-up; Back-up; Tail Stop; Signal; Ignition switch (AM, ST, ACC, IGN); Ammeter; COMMON, LEFT, RIGHT; flasher terminals P, X, L (two units); SIGNAL; SIGNAL; battery (+, −).
Pictorial diagram of signal and hazard circuit connection.
Note:
- This kind of signal and hazard circuit connection is used when using a toggle hazard switch.
- Double flasher
- Assuming that signal lamp is automatically grounded.
- Turn signal indicator was not included in the diagram
- Turn signal light is a controlled connection while hazard light is a not controlled connection.
What’s More
Directions: Draw and connect the given circuit. Write your answer in the answer.
[chart: wiring diagram; blank circuit layout for drawing and connection] Labels printed: AM, ST, ACC, IGN; Ignition switch; Ammeter (+, −); battery (+, −); fuse box with terminals; ground symbol.
What I Have Learned
Directions: Answer the following questions in the answer sheet.
- As a car owner/to be, what are the advantages you have if you know how to interpret and install different lighting connection?
What I Can Do
Direction: Copy and connect the different electrical circuit of a vehicle except doom, courtesy, side marker, stop, and back-up light circuit. Answer the following questions in the answer sheet.
[chart: wiring diagram; Single relay and flasher] Labels printed: Signal; Tail Stop; Back-up; Tail; Back-up; Tail Stop; Signal; SIGNAL PARK; PARK SIGNAL; Ignition switch (AM, ST, ACC, IGN); Ammeter; COMMON, LEFT, RIGHT; Common, High, Low, Pass; Common, 1st Turn, 2nd Turn; Hazard Switch with on, off, common; relay terminals 87, 86, 85, 30; flasher terminals P, X, L; headlamp units labeled HI and LO, RIGHT and LEFT; battery (+, −).
Single relay and flasher.
Post-Assessment
I-Multiple Choice
Direction: Choose the LETTER of the best answer and write in the answer sheet.
The type of circuit connection that is obsolete but still can be seen in some old vehicles.
a. conventional
b. steering column
c. both A and B
d. none of the aboveThe terminal of the Bosch relay are ___________?
a. terminal 30, 85, 86 & 87 `
b. terminal 30, 80, 86 & 87
c. both a & b
d. none of theseSwitch that is used in a back-up light circuit that switches the back-up light when transmission is shifted in reverse.
a. back-up light switch
b. directional light switch
c. headlight switch
d. park lightsHeadlight is a _________________ connection.
a. controlled
b. not controlled
c. unknown
d. none of the aboveThe circuits in the vehicle include all, except—
a. battery
b. lamps
c. switch
d. none of the aboveThe components of horn circuit are the following except?
a. battery
b. bulb
c. fuse
d. relayWhere does the stop light switch installed?
a. brake pedal
b. engine
c. steering column
d. transmissionIf you shift the transmission into reverse position, what happen to the rear light?
a. back-up light will switch on
b. signal light will switch on
c. stop light will switch on
d. tail light will switch onA switch that is used in the brake light circuit?
a. back-up light switch
b. signal light switch
c. stop light switch
d. tail light switchIn horn circuit, what do we call the switch that is operated by the driver to apply horn?
a. back-up light switch
b. horn switch
c. stop light switch
d. tail light switch
II- Identification
Directions: For numbers 11-15, identify what type of circuit diagram that each component belongs? Choose from the following;
- A. Back-up Light Circuit
- B. Horn Circuit
- C. Signal and Hazard Circuit
- D. All electrical circuit
Write your answer in the answer sheet. Answers may be repeated.
[illustration: electric horn with a circular diaphragm and terminals]
[illustration: circular diagram with terminals labeled P, X, and L]
[illustration: automotive transmission assembly with a pointer to a small component]
[illustration: ammeter symbol, a circle with the letter A, with − and + terminals; printed label: Ammeter]
[illustration: wiring diagram of a fuse or relay block with red wires]
Additional Activity
Direction: Enumerate what is being asked in the following questions. Write in the answer sheet.
- List all the electrical components or accessories consisting stop light circuit.
- List all the electrical components or accessories consisting reverse light circuit.
- List all the electrical components or accessories consisting doom light circuit.
- List all the electrical components or accessories consisting courtesy light circuit.
Answer Key
What I Know
- A
- B
- D
- B
- A
- A
- A
- C
- B
- A
- C
- B
- D
- D
- A
What’s In
- HAZARD SWITCH
- FLASHER
- FUSE
- BATTERY
- SIGNAL LIGHT SWITCH
What’s New
It is a wiring diagram specifically for horn circuit.
What’s More
[illustration: wiring diagram showing a battery, an ammeter, an ignition switch, a fuse box, and a lamp]
What I Have Learned
Answers may vary
What I Can Do
Refer to the next page.
Post Assessment
- A
- A
- A
- B
- D
- B
- A
- A
- C
- B
- B
- C
- A
- D
- D
Additional Activities
- Stop light: stop light switch, relay and stop lamp.
- Back-up light: back-up light switch, relay, and back-up lamp.
- Doom Light: doom light switch, relay and doom lamp.
- Courtesy Light: courtesy light switch, relay and courtesy lamp.
All the four circuit has the following- battery, ammeter, ignition switch, fuse box with fuses and related wirings.
What I Can Do
For the headlight circuit connection
For the Horn Circuit connection
[chart: wiring diagram; headlight circuit connection, with labels including Common, 1st Turn, 2nd Turn, High, Low, and Pass]
[chart: wiring diagram; horn circuit connection, with a horn switch, horn relay, battery, and two horns]
For the Signal and Hazard Circuit connection
For the Park and Tail Circuit connection
[chart: wiring diagram; signal and hazard circuit connection, with labels including Signal, Tail Stop, Back-up, Hazard Switch, Flasher, Common, and Signal Light]
[chart: wiring diagram; park and tail circuit connection, with a note and labels including Park, Signal, Tail Stop, Back-up, and Park Light]
Park and Tail light has the same switch. the first turn using this switch will [illegible] on the park and tail light.
References
Strengthened Technical – Vocational Education Program (STVEP)–Competency-Based Learning Materials (CBLM)
For inquiries or feedback, please write or call:
Department of Education – Bureau of Learning Resources (DepEd-BLR) Ground Floor, Bonifacio Bldg., DepEd Complex Meralco Avenue, Pasig City, Philippines 1600 Telefax: (632) 8634-1072; 8634-1054; 8631-4985 Email Address: blr.lrqad@deped.gov.ph * blr.lrpd@deped.gov.ph Telefax: (632) 8634-1072; 8634-1054; 8631-4985 Email Address: blr.lrqad@deped.gov.ph * blr.lrpd@deped.gov.ph
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