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Transcript

Connecting Horn Circuit

Learning Objectives:

Objectives

Objective no. 1

Connect the horn circuit correctly.

Objective no. 2

Operate

the horn successfully.

Try to guess this word.

Shuffled letters:

CRILCEALTE PLREI

Guess the word no. 1

Answer

RCWES RRVDEI

Guess the word no. 2

Answer

RYBEATT

Guess the word no. 3

Answer

STET IGLTH

Guess the word no. 4

Answer

REIW

Guess the word no. 5

Answer

Are you familiar with a horn in a vehicle?

Introduction

Horn

A horn is a sound-making device that can be equipped to motor vehicles, buses, bicycles, trains, trams, and other types of vehicles. The sound made usually resembles a "honk" or a "beep".

Horn

Origins

Instruments made from animal horns have existed since ancient times. They were primarily used as signaling devices.

Horn

Vehicles have a horn or a bell to alert people and let them know the vehicle is in the area.

Importance

In connecting the horn circuit, the following are needed:

Connecting Horn Circuit

Supplies and Materials

Automotive Wires

- - - - - - - - -

Supplies and Materials

Wires

Electrical pliers

Long nose pliers

Tools

Tools

- - - - - - - - -

Screw drivers

Test light

Electrical pliers is used for twisting wires, and others are designed to be used for a combination of tasks including cutting wire.

Uses

Long nose pliers is used to grip small objects, reach awkward places, holding wires, bend loops, and attach wires.

Uses

Uses

Screw drivers are used for screwing (installing) and unscrewing (removing) screws

Uses

Test light is used in checking circuits and devices for continuity, open circuits, and improper wiring.

Battery 12 volts

EQUIPMENT

Electrical mock-up/Vehicle

PROCEDURE IN CONNECTING HORN CIRCUIT

PROCEDURE:

1. Prepare the necessary tools and materials needed.

First

Second

Note: Horn relay has corresponding number, these are 87, 86, 85 and 30.

2. Connect a wire to the terminal of the horn and other end of the wire to the 87 terminal of the horn relay. The other terminal of the horn is connected to the vehicle body that serves as ground.

Note:

Third

3. Connect the 86 terminal of horn relay to the push button switch. The other terminal of the push button switch is connected to the ground.

4. Splice the wires of 30 and 85 terminals of horn relay and connect them to the fuse load terminal. Connect the other end of the fuse source terminal to the IG or ACC terminal of the ignition switch.

Fourth

5. From the B terminal of the ignition switch, connect a wire to the terminal of the ammeter. The other terminal wire of the ammeter is connected to the positive (B+) terminal of the battery.

Fifth

6. Connect the negative terminal of the battery to the vehicle body that serve as ground.

Last

Reminder:

The connection can be made in a reverse manner from step 5 to step 2 except step 6 which is usually done after checking the wiring connections.

PROCEDURE IN CONNECTING HORN CIRCUIT

PROCEDURE:

1. Prepare the necessary tools and materials needed.

First

2. Connect a wire to the terminal of the horn and other end of the wire to the 87 terminal of the horn relay. The other terminal of the horn is connected to the vehicle body that serves as ground.

Second

Third

3. Connect the 86 terminal of horn relay to the push button switch. The other terminal of the push button switch is connected to the ground.

Fourth

4. Splice the wires of 30 and 85 terminals of the horn relay and connect them to the fuse load terminal. Connect the other end of the fuse source terminal to the IG or ACC terminal of the ignition switch.

5. From the B terminal of the ignition switch, connect a wire to the terminal of the ammeter. The other terminal wire of the ammeter is connected to the positive (B+) terminal of the battery.

Fifth

6. Connect the negative terminal of the battery to the vehicle body that serves as ground.

Sixth

Connecting Horn Circuit (REVERSE STEP)

PROCEDURE IN CONNECTING HORN CIRCUIT

PROCEDURE:

Fifth

5. From the B terminal of the ignition switch, connect a wire to the terminal of the ammeter. The other terminal wire of the ammeter is connected to the positive (B+) terminal of the battery.

4. Splice the wires of 30 and 85 terminals of horn relay and connect them to the fuse load terminal. Connect the other end of the fuse source terminal to the IG or ACC terminal of the ignition switch.

Fourth

3. Connect the 86 terminal of horn relay to the push button switch. The other terminal of the push button switch is connected to the ground.

Third

2. Connect a wire to the terminal of the horn and the other end of the wire to the 87 terminal of the horn relay. The other terminal of the horn is connected to the vehicle body that serves as ground.

Second

6. Connect the negative terminal of the battery to the vehicle body that serves as ground.

Last

Let's have a review.

Review

Quiz

1. It is used for twisting wires, and others are designed to be used for a combination of tasks including cutting wire.

1

A. electrical pliers

B. long nose pliers

C. screw driver

2. It is used in checking circuits and devices for continuity, open circuits, and improper wiring.

2

A. automotive wire

B. screw driver

C. test light

C. test light

3. It is used to grip small objects, reach awkward places, holding wires, bend loops, and attach wires.

A. automotive wire

B. electrical pliers

C. long nose pliers

3

C. long nose pliers

4. It is used for screwing (installing) and unscrewing (removing) screws.

4

A. electrical pliers

B. screw driver

C. test light

B. screw driver

Vehicles have a horn or a bell to alert people and let them know the vehicle is in the area. The horn is often used to prevent an accident.

Importance of horn

1. Prepare the necessary tools and materials needed.

2. Connect a wire to the terminal of horn and other end of wire to the 87 terminal of horn relay. The other terminal of horn is connected to the vehicle body that serves as ground.

3. Connect the 86 terminal of horn relay to the push button switch. The other terminal of the push button switch is connected to the ground.

Procedure:

4. Splice the wires of 30 and 85 terminals of horn relay and connect them to the fuse load terminal. Connect the other end of the fuse source terminal to the IG or ACC terminal of the ignition switch.

5. From the B terminal of the ignition switch, connect a wire to the terminal of the ammeter. The other terminal wire of the ammeter is connected to the positive (B+) terminal of the battery.

6. Connect the negative terminal of the battery to the vehicle body that serve as ground.

SAFETY RULES FOR AUTOMOTIVE REPAIR

Tips

Keep work areas clean and organized. Pick up tools and use tool cabinets to keep walkways clear and free from clutter.

Tip no. 1

Tip no. 2

Make sure fire extinguishers are easily accessible and appropriate for all potential fire types. In the event of a fire, extinguishers need to be accessed quickly and be charged with the right materials to put out the type of fire: i.e., gas, oil, electrical, and so on.

Always disconnect the battery when working on electrical systems and near/around electrical wiring. Even when the vehicle is off, there is still the potential for current to pass through electrical wiring.

Tip no. 3

Tip no. 4

Never place hands, tools, or other objects near the engine while it is running. The moving parts and components could cause injury to a person or the vehicle itself.

Never work underneath a vehicle unless it has been properly supported. Raising the vehicle off the ground to access the underside requires verifying it is stable, and that there is no risk of the vehicle falling on top of the mechanic.

Tip no. 5

Always remove the keys from the ignition switch. Never leave the key in the ignition switch, as the key can draw an electrical charge from the battery.

Tip no. 6

Be aware of the vehicle’s temperature before beginning any work. The engine, manifold, exhaust system, and radiator could be hot and cause skin burns. Plus, the radiator coolant is still pressurized.

Tip no. 7

References:

References:

Technology & Livelihood Education– Grade 10

Learner’s Material

First Edition, 2013

Development Team of the Learner’s Material

Consultant:Alfredo L. Alcala Jr., Lorenzo A. Ladia and Famy L. Pepito

Authors: ROBERTO S. DAQUIL FERNANDO N.MAGALANG

HT VI, Manila High School HT III, C.M. Recto High School

DepEd – Manila DepEd – Manila

Editors: Lando T. Guzman, Lynette T. Guzman, Eugenio Masilungan

Reviewers: Arnel C. Anonical, Joel G. Castillo, Arnold M. Mendoza, Marvin A. Mendoza, Lino A. Olit, Atanacio D. Pagkaliwangan, Benjie R. San Juan, and Rainbee Priol

Illustrators:

Subject Specialists: Albert Erni, James Julius M. Liquigan, Owen S. Milambiling

Management Team: Lolita M. Andrada, Jocelyn DR Andaya, Bella O. Mariñas, and Jose D. Tuguinayo Jr.

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