Diagnose a Car Starter's Solenoid System

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Part of the video series: How to Replace a Starter Solenoid

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Summary: How to diagnose the starter system of a car. Learn about starter solenoid maintenance in this free video on auto repair.

Views: 1,046 | Tags: maintenance, auto, engine, car, motor, repairs, relay, starter, solenoid, ignition, starts

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About the Expert

Nathan McCullough Nathan McCullough graduated from Nashville Auto-Diesel College and received their Craftsmanship Award and Honor Seal. McCullough has managed several automotiv... read more

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Video Transcript

Diagnose a Car Starter's Solenoid System

In this clip we're going to talk about the proper service procedure in order to diagnose, remove and replace you vehicles starter solenoid. In this step we're going to talk about the proper way to diagnose the wiring from the solenoid to the battery and from the solenoid to the starter. What that will do is isolate the entire system, the ignition switch, the battery wiring and the battery and the starter wiring and the starter to indicate that our solenoid has failed. What I'll do is take my test light and hook it up to the negative side of the battery and measure the positive circuit. As you see it'll light up, got my negative right on the battery terminal, right to the positive side. What that's doing is it's testing the conductivity through that wire back into the battery and through to the ground side. As you see we have a good connection, go ahead and do it a couple times for ya. What we'll then do is test the other side of the circuit. So I'm going to have to take my test light and hook it up to the positive side of the battery and we'll check the ground side of the circuit. I'm going to go ahead and tough the other terminal, as you can see the light lights up. What that's doing is testing the ground side of the circuit from here all the way through the wiring into the starter, through the starter motor back through the body and into the battery. That is the proper way to isolate your starter solenoid from the rest of the electronic systems.