How do you install a starter relay?

Asked By: Minel Urnecli | Last Updated: 16th March, 2020
Category: automotive auto parts
4.2/5 (31 Views . 41 Votes)
How to Install a Starter Relay
  1. Raise the hood on your vehicle and then locate the battery.
  2. Use a socket wrench to remove the black wire from the battery.
  3. Wrap electrical tape around the metal terminal at the end of the cable until no metal is visible and then lay the cable down on the side of the battery case.

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Besides, do you need a relay for a starter?

It doesn't need a starter relay but you can use one if you want. You can also eliminate the starter button. Without the relay, your starter power comes from the start position on the ignition switch which is on a spring like a car.

Furthermore, how much does it cost to replace a starter relay? The average cost for a starter relay replacement is between $53 and $62. Labor costs are estimated between $30 and $39 while parts are priced at $23.

Accordingly, how do you fit a starter relay?

To set up a relay to your starter: run the ignition switch wire "1" (that normally connects at the top of the solenoid) to connector 86 of the relay; run wire "2" to ground from connector 85 of the relay; run a 12 gage wire "3" directly from the battery positive terminal (through a 20 amp fuse) to connector 87 of the

Where is the starter relay on a?

The starter relay location may vary depending on the vehicle type and model. It can be in the fuse box (also called a power box), the fuse panel under the dash, or on the right fender. Most cars will have it located under the hood, inside the long box with a black cover.

33 Related Question Answers Found

Why do I need a starter relay?

When the ignition key is turned all the way to the "start" position, it allows electricity to flow to the starter solenoid (relay) which then connects the battery to the starter motor. The reason being that some circuits (such as the starter) in a car require a tremendous amount of current.

What does the starter relay do?

The main function of a starter relay is to work as a switch for the starter solenoid by switching on a large current stream from a smaller one generated from the ignition switch circuit. It does the same for the starter motor when it is an automotive car.

How do you wire a starter relay?

How to Wire a Starter Relay
  1. Mount the starter relay. There are two major types.
  2. Connect the starter motor lead to the switched output.
  3. Connect the smaller terminal or terminal post marked SIGNAL, SWITCH or IGN to the ignition switch.
  4. Connect the battery positive terminal to the other large terminal last, which may be marked BATTERY or BAT.

What is the advantage of using a relay?

The advantage of relays is that it takes a relatively small amount of power to operate the relay coil, but the relay itself can be used to control motors, heaters, lamps or AC circuits which themselves can draw a lot more electrical power.

What is a relay switch on car?


In the most simple terms an automotive relay is an electronically operated switch. They are found in all types of vehicles - cars, trucks, vans, trailers and boats. They employ an electromagnet device to mechanically manoeuvre a switch to make or break an electrical circuit.

How does a starter solenoid work?

A starter solenoid is an electromagnet which is actuated to engage the starter motor of an internal combustion engine. Its primary function is as the actuating coil of a contactor (a relay designed for large electric currents) which connects the battery to the starter motor proper.

What does a starter solenoid do on a boat?

The solenoid on an outboard engine has the important function of transmitting battery voltage to the starting motor. When the contact inside the starter solenoid activates electronically, a circuit opens that passes electrical current from the battery to the starter, which turns the engine over.

Can you bypass starter relay?

A shorted relay or solenoid can allow the starter to remain engaged. Assuming the new starter motor is good, check all electrical connections between the battery, relay, solenoid and starter. The easiest way to check the starter on the vehicle is to use jumper cables to bypass the vehicle's electrical system.

Where is the starter relay fuse?

The ignition relay is normally found in the fuse box situated underneath the hood and it transfers electricity from the battery to the ignition components, which allows you to start the car in the blink of an eye.

Can a relay cause a car not to start?


If the relay fails it will cut off power to fuel pump and ignition system, which will result in a no power, and therefore no start condition. You may find that turning the key may power on the accessories, and may even crank the engine.

Does the starter have a fuse?

Often there is a fuse and relay for the car starter in the fuse box but sometimes they will have external fuse on the fuse line or close to the car battery. The starter motor fuse is usually big and it will not be in the fuse box.

How do I know if my starter relay is bad?

Here are some symptoms of a bad or failing starter relay
  1. Vehicle does not start.
  2. Starter stays on after engine started.
  3. Intermittent issues starting the vehicle.
  4. Clicking sound coming from the starter.

Is my starter relay bad?

If your starter relay has gone bad, the electrical signal will never make it from the battery to the starter motor. As a result, your engine won't turn over - no matter how many times you turn the key. A faulty relay often produces an audible clicking sound when you turn your car.

What happens when the starter solenoid goes bad?

When the solenoid goes bad, something happens so there is inadequate or no current to the starter when you turn the key. The power contacts may burn or corrode, adding enough resistance to the circuit so that the starter doesn't engage properly, or doesn't turn the engine over.

Where is the ignition relay located?


The ignition relay is one of the most important electronic relays found on modern vehicles. It is usually located in the fuse and relay panel beneath the bonnet, and is responsible for providing power to the vehicle's ignition system, and some of the fuel system's components.

What causes a starter relay to go bad?

Starter relays rarely become faulty, but when they do, it can mean a lot of trouble because your car will not start. Several things can cause a starter relay to fail, including corroded contacts, a faulty circuit, contacts that weld together, or just a relay that's too old.

How can I start my car with a bad starter?

How to Start a Car with a Bad Starter?
  1. Check the connections. The first thing to check is the connections.
  2. Check the engine grounds. A starter doesn't have a ground wire coming from the battery.
  3. Check the starter solenoid's wire.
  4. Check for corrosion.
  5. Tapping the starter with a hammer.
  6. Jump-start the car.
  7. Bypass the starter relay.
  8. Push start the car.