1997 Ford 150 new starter spinning when battery is connected
After installing a new starter in my F150 the starter
continues to spin. I'm thinking its a short in the wiring but
wanted to see if anyone else had the problem and maybe
on how to fix it before I started trace the wiring.
Sometimes the switch inside the solenoid gets stuck, and keeps power going to the starter. Another culprit is the key cylinder. A voltage drop test on the starter will give you some clues. A remote chance is that the starter needs to be shimmed, as it may be the pinion gear is getting stuck engaging the flywheel, if it can't retract fully, the switch in the solenoid will continue to make contact.
If when installing the small wire on the solenoid is touching the top post that the battery cable is attached too, the starter would stay energized. Check to insure that there is nothing touching the large stud on the solenoid from any of the 2 smaller post of the solenoid. Otherwise you would need to check the starter relay (also know as a starter solenoid) on the fender well.
I just had that problem in my 1977 Ford F-250 it was the starter solenoid. Easy and cheap fix
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