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Old Feb 3, 2010 | 11:39 AM
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98 Expy electrical issue

My Expy's lights-interior and exterior blink rapidly all the time. Battery and Alt are new. Grounds are good, terminals cleaned etc. I cleaned the connections at the solenoid and put dielectric on them the other day, situation went away for a day and is back. Anyone have an idea what to look for?
 
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Old Feb 3, 2010 | 01:11 PM
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Have you checked the voltage? Does it give you a pulsing voltage? My bet is a bad ground somewhere....maybe not BAD, but not a GOOD ground.
 
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Old Feb 3, 2010 | 01:30 PM
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voltage is good. A friend who is a Ford Tech says he had a similar issue on a super duty and it was corrosion at the solenoid. Obviously that didn't fix it in my case, no corrosion present. All other system grounds I can find are decent, not corroded etc. This mus be a major ground as it effects the headlights and interior lights. Anyone have an FSM that will show such information?
Truck runs well and we are not discharging the battery at all.


Where is the engine ground? I'll start there. since I dont' know where it is I'll need to check it first!
 
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Old Feb 4, 2010 | 12:23 PM
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Why is the alternator new? Did you replace it because of the blinking problem, or you replaced it for another problem you had.
 
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Old Feb 4, 2010 | 02:57 PM
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Replaced for other issue. It was a reman and lasted 14 months. 12 month warranty! Issue existed before alt and battery were replaced.
 
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Old Feb 4, 2010 | 10:43 PM
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The reason I ask; People sometimes don't have very good luck with re-man alternators, and end up with more problems than they started with.
 
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Old Feb 5, 2010 | 04:27 AM
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The first one quit quite abruptly. We've had the problem prior to the replacement. I want to check some grounds but I don't know where they are. Where is the engine ground? There's one on the firewall near the battery and it's ok. I can get the chiltons online but it's through the library and really no help at all.
 
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Old Feb 5, 2010 | 05:33 PM
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You have to get the factory manuals usually to find all the ground locations. If you feel something may not be grounded properly, there is no reason why you could not add a ground wire.
 
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Old Feb 5, 2010 | 07:17 PM
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I guess I'll have to dig around and find a FSM. The Expy is going into reserve status in the next couple months and I don't want to spend a bunch of money on it. Just have to keep it operational for the kids to take to track practice.
 
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