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How can you test if it is the ignition switch or starter motor when there is a grinding noise when starting?
Wiki User
∙ 15y ago
If there is a grinding noise, it means that the fly wheel for the starter is messed up. If the starter is grinding, there is nothing wrong with the switch. The grinding is mostly indicative that the bushings in the starter are worn. The grinding will cause wear and damage to the armature and the interior of the starter casing also. If you are mechanically inclined, you may want to remove the starter and open it for inspection. If the damage is slight, you may want to replace the bushings yourself (do the brushes too while you're at it). Otherwise, it might be wise to go ahead and replace the starter. You also ask how to test the starter. To test the starter, it is best to remove it. Use your jumper cables and clamp the red (positive) cable to the bolt where the positive cable attaches at the starter and the opposite end to the positive battery post. Clamp the black (negative) cable to the negative battery post and "touch" the opposite end to the starter casing. Before you "touch" with the negative cable, place your foot over the starter to secure it as it will "jump" when you "touch" it. The starter should spin freely and smoothly, if it doesn't, you will recognize the grinding noise. If the starter spins freely and smoothly, then the problem may lie in the flywheel as mentioned by the previous contributor. The condition of the gear teeth on the starter drive will be the most evident if there is a fly wheel problem.
Wiki User
∙ 15y ago
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