What to know about the Starter Relay:
When you turn the key in your car’s ignition, a circuit is closed in the ignition switch. That electrical connection provides power to the starter relay, which then alters from its off position to ‘on’ for as long as the key is held in the start position. The starter relay transmits power from the car battery to the starter solenoid, and the starter motor engages to start your car. If the starter relay sticks or fails while it is in the off position, your vehicle will not start or even click when the key is turned, although the interior accessories will still work. If the starter fails while turning the key, and is stuck in the on position, the starter will stay engaged with the transmission flywheel. Damage can occur to the transmission flywheel, the starter, the relay, and the circuit.
Facts to Note:
If your car is not starting, the starter relay is not necessarily at fault. There are several components, including the battery that can show the same symptoms as a failed starter relay.
Disconnect the car battery when servicing any electrical part to prevent damage or injury.
How to Fix:
The vehicle battery is disconnected
The defective starter relay is taken out
The new starter relay is fixed
The vehicle battery is wired back
The vehicle is started and checked for starter relay operation
The starter relay will possibly last the lifetime of your vehicle, and does not need servicing. If the starter relay becomes abnormal, or if you believe it is not working correctly, have one of your expert mechanics diagnose it.
Common symptoms indicating you may need to change the Starter Relay:
Car will not start or turn over
Engine erratically turns over and starts
Starter motor stays engaged all the time
Importance of this service:
A working starter relay is necessary for the proper functioning of your car. You will not be able to start your car if the starter relay spoils, so you will have no choice but to repair the relay before using your vehicle again.