electrical question
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Posting Guru
Joined: Aug 2006
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From: Perry Georgia
electrical question
I have a 1987 F250 6.9 Diesel. When I start to work in the morning, 5:15am The volt meter acts crazy. It will go to the charge side but still in the white and stay there for awhile. Then it will drop back to the discharge side but not all the way do total discharge. It will do this repeatedly all the way to work which is 20 miles. Charge then discharge, back and forth all the way to work. There are no idiot lights at all during this time. On my way home in the afternoon everything works fine. Also in the morning the only electrical stuff running is the lights. The lights don't dim when the volt meter drops and everything seems ok except the volt meter acts up. Any ideas?
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Posting Guru
Joined: Aug 2006
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From: Perry Georgia
The battery doesn't run down. At night is when I notice the voltage meter going crazy. I watched in this afternoon,3 pm and the meter didn't jump around like it had this morning at 6am. Could the lights be shorting out somewhere?
Post Fiend
Joined: Nov 2004
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From: Manitoba
Check the main light switch connector for burned up and the light switch for damage to the prongs.
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Posting Guru
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i forgot to mention that, good thing you thought of that, i had a head light switch problem actually i had it twice, the first time i had the problem i couldnt get the tail lights and head lights to come on together, found a used switch and that fixed it for about 5 months, then it started going out again and i would just be going down the road and the lights would go out.
it sucked my step dad almost recked and i almost didi one time.
it sucked my step dad almost recked and i almost didi one time.
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Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
This mod will eliminate the headlight switch problem forever.
It uses relays to take the headlight amperage load off the headlight switch and wiring.
https://www.ford-trucks.com/article/...ay_System.html
It uses relays to take the headlight amperage load off the headlight switch and wiring.
https://www.ford-trucks.com/article/...ay_System.html
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Posting Guru
Joined: Aug 2006
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From: Perry Georgia
Thankx guys I'll check the light switch asap. Today I changed the fuel selector valve and it will be nice to know I have a full rear tank but couldn't get to it without syphening it out.
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Posting Guru
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From: Perry Georgia
Just an update on the electrical problem. I R&R the regulator since I had bought one when I first got the truck. I don't remember why but it wasn't being used so I figured I'd try that first. I changed it and didn't drive it till the next day when it almost pegged the volt meter when I went to go to work. I limped back home so I wouldn't damage anything. I put the old regulator back on to get to work. On my way to work everything worked like it was supposed to. No more problems. I think the connections might have been bad. I know I had a 1977 gasser that would give me all kinds of problems until I unplugged the regulator a number of times and then everything worked fine. Corrosion problems I would guess in both cases. Either way, everything is working fine now.
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Joined: May 2003
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From: Joliet, Illinois
A donor??
As in parts from a truck that might be just as old and could be no better shape than the one being fixed?
Wiring gets old, and if you are pulling and reinstalling old wiring, you just do more damage!
There are companies that reproduce wiring for older trucks, that is assuming the factory no longer offers it as NOS, aka New Old Stock.
As in parts from a truck that might be just as old and could be no better shape than the one being fixed?
Wiring gets old, and if you are pulling and reinstalling old wiring, you just do more damage!
There are companies that reproduce wiring for older trucks, that is assuming the factory no longer offers it as NOS, aka New Old Stock.
Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
I have found something as simple as removing a connector and the reinstalling it can fix some problems like he was having.
To many connectors have different metals from one side to the other and cause corrosion just from being plugged in.
To many connectors have different metals from one side to the other and cause corrosion just from being plugged in.