Question about 1987 Ford Aerostar
You have two things at the starter neede to turn over the engine besides a good ground. The larger wire has battery voltage all of the time. (around 13 volts) The smaller wire gets positive voltage when the ignition key is turned to start only. You need to check this with the wire off of the solenoid. If the wire still has power with the key not at start, you might be looking at an ignition switch issue.
Note, some starters have two spots to hook the small wire to, make sure you have the right one.
Keep in mind that sometimes a replacement starter is also bad, and finally, make sure the starter drive gear isn't too tight to the starter gear (Flywheel) as that may make it bind or stick.
Posted on May 08, 2010
This sounds like 1 of only 2 things, either the starter is getting hung up mechanically, or the ignition switch is getting stuck. Sounds like you have covered everything else. Let me know what you find. I would start by taking off the starter and verify that there are no marks on the starter gear or the flywheel indicating a mechanical issue.
Posted on May 07, 2010
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Posted on Jan 02, 2017
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