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Where Is A Solenoid Located

When to Replace a Starter Solenoid

The symptoms for a bad starter solenoid are pretty evident since it almost always prevents your engine from starting at all. If you hear a clicking noise when you turn the ignition key but the engine doesn’t crank, there’s plenty of battery power but there’s no cranking or clicking noises when you hit the ignition, or the starter keeps cranking after you stop turning the key, it could very well be a bad starter solenoid.

It could also be a faulty starter motor itself, though, so it’s critical to verify the problem. Manually check that the starter is getting power when you turn the key by verifying there’s 12-volt power at the solenoid, then cranking the engine over while checking for voltage out of the solenoid to the starter. If there’s low or no voltage present when cranking, the solenoid is likely bad.

Safety Precautions

When you’re changing the starter solenoid, safety is paramount. Begin by disconnecting the battery’s negative cable to prevent a short, and always wear gloves and eye protection. Work in a clean area free of any combustible items since a small spark could ignite it.

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Tools and Parts Required

To replace a starter solenoid, you’ll need a few supplies on hand to make it go smoothly. You’ll require:

  • Car ramps or a floor jack and axle stands
  • Wrench set
  • Ratchet and socket set
  • Impact wrench
  • Screwdriver set
  • Eye and hand protection
  • Torque wrench

How to Replace a Starter Solenoid

Common Mistakes to Avoid

One of the most common problems that DIYers have with a starter solenoid replacement is installing the wiring wrong. Crossing wires can and will result in sparks, blown fuses or relays, or even a short that can damage the battery or start a fire.

To prevent this issue, take a snapshot of the wiring connections before removing your old solenoid as a reference when you put it back together.

Shop for starter solenoids at an AutoZone near you, along with starter motors and any other parts you need to fix your car. If you decide that it’s too big a job to tackle on your own, let AutoZone help you find qualified professional mechanics through our Shop Referral Program.

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