starter cranks then free spins gmc sierra

This is also a good time to check the wires going to the solenoid for corrosion and clean them off with a wire brush if necessary.Īnd other people's advice is also good, ground wires can cause intermittent issues. If it's significantly lower, you know something is off. You should get the same voltage at the 12v cable as you do directly from the battery terminals. Ignition switch wire will probably be purple FYI. The casing of the starter itself is the ground, don't touch the black probe to the ignition switch wire terminal. At which point I would take a multimeter and check the voltage at the 12v wire on the solenoid. If it makes a strange noise or sounds weak or just doesn't go at all, it's most likely the starter/solenoid, but could also be a bad connection to 12v power. If you immediately get strong cranking of the starter, then you know it's not that. So just take a screwdriver and touch both points together (make sure the handle isn't metal!). When the solenoid gets power from the ignition switch, it basically just bridges the connection and the 12v power turns the starter, kind of like an over glorified relay switch. One connection will be constant 12v from battery, the other will be a wire from your ignition switch. Easy way to check the starter is to get under your truck and use a metal tool such as a screwdriver to bridge the gap between the two wire connections on the solenoid.

Starter cranks then free spins gmc sierra