When a solenoid no longer functions, the starter will not get any power to engage the flywheel and start the engine. In most cases there will be a clicking noise coming from inside of the solenoid as the magnetic switch attempts to close and complete the circuit. However, a drained battery or faulty wiring will also cause the same symptoms. Checking the voltage at the solenoid is a sure way to troubleshoot the problem.

1. Step 1

   Set your voltmeter to read 12 volts DC.

2. Step 2

   Attach the negative voltmeter probe to a negative ground wire on either the car or the negative post on the battery.

3. Step 3

   Attach the positive probe to the wire that connects the solenoid with the starter.

4. Step 4

   Activate the solenoid--in most cases, this means turning the ignition on. If you do not read 12 volts, the solenoid is bad and needs to be replaced.