Lights dim on acceleration
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Elder User
Joined: May 2011
Posts: 973
Likes: 2
From: Bellefontaine, OH
Lights dim on acceleration
1986 f250 xlt
Just started a couple days ago as the bitter cold started setting in
My lights dim on I can't even say heavy acceleration even just normal
I am bad with electrical that is why I love this truck so much (not much to it)
I don't know where to begin
Please help
Just started a couple days ago as the bitter cold started setting in
My lights dim on I can't even say heavy acceleration even just normal
I am bad with electrical that is why I love this truck so much (not much to it)
I don't know where to begin
Please help
Thread Starter
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Elder User
Joined: May 2011
Posts: 973
Likes: 2
From: Bellefontaine, OH
Didn't know it would take this long to be able to post back with the answer to what was going on and honestly I can't believe the answer if I didn't find it myself...
Somehow the nut that holds the bracket that holds the battery cable going down to the starter fell off and allowed the cable to fall in front of the vacuum pump pulley and my guess at this point is when I gave the truck throttle the cable was pushed into the pulley and somehow without catching fire my pulley ate all the way through!!!!
I only figured this out because one day suddenly my truck wouldn't start all I would get is a click and I thought it was the starter I had the new starter in and was hooking the battery cables back up and suddenly sparks and that was definitely the problem!
Somehow the nut that holds the bracket that holds the battery cable going down to the starter fell off and allowed the cable to fall in front of the vacuum pump pulley and my guess at this point is when I gave the truck throttle the cable was pushed into the pulley and somehow without catching fire my pulley ate all the way through!!!!
I only figured this out because one day suddenly my truck wouldn't start all I would get is a click and I thought it was the starter I had the new starter in and was hooking the battery cables back up and suddenly sparks and that was definitely the problem!
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Elder User
Joined: May 2011
Posts: 973
Likes: 2
From: Bellefontaine, OH
I am definitely glad the ol girl didn't burn next to my kids this truck is a family member to me... And now that I have my 85 and I get it up to par my 86 is getting a full frame off restoration and build upgrade
Posting Guru
Joined: Dec 2012
Posts: 1,065
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From: western washington
I drive big rigs for work and we have to perform pretrip inspections every day, you never know what you will find, once I stopped for lunch, no problems, fired her back up, and the AC compressor had, seized, and before I could turn the key off it burnt the belt in half. Things bust, bend, over heat. corrode, fray, vibrate louse and fall off, that's why airplane bolts are safety wired.
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Logistics Pro
Joined: Nov 2013
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From: Mojave, Ca
Any chance you could upload a photo of how and where the cable was rubbing the pulley for education?
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Thread Starter
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Elder User
Joined: May 2011
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From: Bellefontaine, OH
https://www.ford-trucks.com/forums/a...1&d=1387850339
https://www.ford-trucks.com/forums/a...1&d=1387850412
These are the only two I managed to get before my phone died but I think you can see how the cable come loose and got in front of the pulley.
https://www.ford-trucks.com/forums/a...1&d=1387850412
These are the only two I managed to get before my phone died but I think you can see how the cable come loose and got in front of the pulley.
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