7.3 starts on its own!!!!! need helpppp - Ford Powerstroke Diesel Forum
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Old 06-09-2013, 06:14 AM
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Angry 7.3 starts on its own!!!!! need helpppp

ok so when to start my truck friday night after a party. smelt this burning smell when i opened the door went to start and wouldnt start so i said f**k it and i got a ride home. got the truck loaded on a trailer yesterday and brought it home. realized it was the starter so i got a new one from advanced. brought it home and put it on truck started up perfectly fine. scooore. but after 10 15 seconds of running the started engaged so i shut the truck off and i was sitting there a min and the truck started to crank again while the key was off so i bought a new ignition switch and selinoid that goes on the fender. now im stumped. i dont know what to do and i really need my truck to go to work with. please helpppp!
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Old 06-09-2013, 08:24 AM
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Start at the Key, and trace it forward.

Is the relay on the fenderwell getting the keys signal to throw? Unplug one of the sm wires and see.

If not, and that relay is still sending Big Power to the Starter, THAT relay is Bad.

If so, the Ign Cly is Bad as it shouldn't be completing that circuit when Off.

If everything is OK with those two, then the problem must be with the starter, or the associated wiring connecting to just it.
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Old 06-09-2013, 08:38 AM
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my guess is the starter solenoid is shorted out internally..
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Old 06-09-2013, 11:03 AM
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i replaced the selenoid. i wonder if it could be the relay and do u know witch one it is i dont have a manuel
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Old 06-09-2013, 12:01 PM
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What yr Truck? (you should always include that, they're Not all the same)
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