1981 F100 L6 Electrical Problems
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3rd Gear
Joined: Jan 2023
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1981 F100 L6 Electrical Problems
This is my first project truck and I got it running but I noticed the starter solenoid was smoking so I took the negative cable off the truck to stop it and it sparked and I wasn’t able to put it back without it sparking a lot. I replaced the battery cables, start, solenoid and voltage regulator. I was wondering if getting a new alternator and voltage regulator connector would solve my issue.
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Joined: Jan 2001
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From: Virginia
The key is not on?
The headlights are not on?
You didn't say it was trying to start?
You could put a testlight between the battery negative and the battery negative terminal for testing. Put the negative terminal on a rag, and poke it with a testlight. Take the alligator clip end of the testlight and clip it to the battery negative. If the testlight lights up bright, you do have an excessive draw. So then you can go around disconnecting things till you find what makes the light go out. Make sure you have a older style testlight with the conventional bulb, not one of those fancy LED testlights.
You can pull the fuses one at a time, pull any wires off the battery for added electrical stuff, and one thing you can pull wires off is the alternator. Do this one at a time till the light goes out. When it does, that is the culprit.
Lead Driver
Joined: Nov 2013
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Aftermarket starter relays have a VERY high failure rate. Maybe start by installing a top quality name brand relay and go from there:
https://www.ford-trucks.com/forums/1...i-mean-it.html
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