electrical problem... please help
Thread Starter
|
Freshman User
Joined: Aug 2010
Posts: 29
Likes: 0
electrical problem... please help
1986 F250 6.9 diesel 2x4
So my friend was driving my truck and it just shut off. He said he thought there might have been a burning plastic smell but he wasn't sure.
Before the tow truck arrived only the hazard lights worked. no head lights, wipers, turn signals, climate control. nothing worked no matter which position the key was in.
After being dropped off now the hazard lights don't even work.
The batteries are fully charged.
I checked the fuse box and there was continuity everywhere except for a 25 amp fuse in the top right corner. fuse is fine. don't know if wiring is. don't know what it is for?
i also jumped the glow plug relay and the fuel shut off valve and they both worked fine.
I checked all the grounds i could find and they were all ok.
But I found this black wire to nowhere. See pic.
Anyone know whrere this should go?
Where do I go from here?
Please help...
So my friend was driving my truck and it just shut off. He said he thought there might have been a burning plastic smell but he wasn't sure.
Before the tow truck arrived only the hazard lights worked. no head lights, wipers, turn signals, climate control. nothing worked no matter which position the key was in.
After being dropped off now the hazard lights don't even work.
The batteries are fully charged.
I checked the fuse box and there was continuity everywhere except for a 25 amp fuse in the top right corner. fuse is fine. don't know if wiring is. don't know what it is for?
i also jumped the glow plug relay and the fuel shut off valve and they both worked fine.
I checked all the grounds i could find and they were all ok.
But I found this black wire to nowhere. See pic.
Anyone know whrere this should go?
Where do I go from here?
Please help...
Laughing Gas
Joined: Dec 2010
Posts: 1,155
Likes: 0
From: Las vegas nevada
i had that happen i had a fire underneth the dash it was a dead short and i lost power to everything i found my short it happened to be my winshield wiper Black box that make s it intermiindant .... i unhooked it and found the inline fuseabile link was fired ...... i peplaced it and everything came back to life there is a few fusiable links on the pasenger side battery area the look like this
Thread Starter
|
Freshman User
Joined: Aug 2010
Posts: 29
Likes: 0
there are a bunch of those and some look like they were next to one that burnt up but they don't actually look burnt themselves. but i'll go through and check each one.
Do you know what the top right fuse in the fuse panel goes to? There was a 25 amp fuse in mine but the circuit does not ground out.
Do you know what the top right fuse in the fuse panel goes to? There was a 25 amp fuse in mine but the circuit does not ground out.
Laughing Gas
Joined: Dec 2010
Posts: 1,155
Likes: 0
From: Las vegas nevada
the inline fuses melted somewhere inline that feeds the fuse panel aswell i think there is 4 or 5 fuseable links in the area check with a meter be for and after the link to verify u have power going to and after the link to confrim that it is good or bad
Laughing Gas
Joined: Dec 2010
Posts: 1,155
Likes: 0
From: Las vegas nevada
in your fuse block one side of the fuse prong is your line voltage the other will be your load............. if you havent found the dead short yet i would try replaceing the fuseable link then take out all you fuses and put them in back one by one until (A) you find what shorted out when you put a new fuse in or (B) when your pulling fuses u find one burnt up then replace if it blows again then some where is your short... make since? maybe? lol
Trending Topics
Laughing Gas
Joined: Dec 2010
Posts: 1,155
Likes: 0
From: Las vegas nevada
ohm that wire to ground if you dont have continuity then i would say its not a ground wire so apply voltage and see if it comes back to life? attach a fuseable link to it so if it is grounded out that will blow before anything else does
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Posting Guru
Joined: Jul 2004
Posts: 1,627
Likes: 0
From: West Valley Utah
In the first picture there is a gray connector with yellow wires almost directly under your hand. Check that connector and the fuseable link(s) attached.
There is a main connector right in that area that has a habit of burning out. From the picture it looks like it could be the one.
There is a main connector right in that area that has a habit of burning out. From the picture it looks like it could be the one.
Laughing Gas
Joined: Dec 2010
Posts: 1,155
Likes: 0
From: Las vegas nevada
You can use a razor blade.... Black probe to ground red probe to oneside of link using the razor blade with the probe slice a hair into the wire and let the probe touch the razor then you'll show if you have power then you can tape it up it you like
Thread Starter
|
Freshman User
Joined: Aug 2010
Posts: 29
Likes: 0
so i found a starting point.
There is a round thing bolted to the inside passenger fender.
4 terminals. top terminal has large black wire, left terminal has small red wire, right terminal is empty, bottom terminal has a wire from the battery, another wire and then a 14 gauge fuseable link.
the link was broken but not visibly burnt so i cut it and reconnected it to the terminal. when i put the battery back on it burnt instantly. where is that wire going to?
There is a round thing bolted to the inside passenger fender.
4 terminals. top terminal has large black wire, left terminal has small red wire, right terminal is empty, bottom terminal has a wire from the battery, another wire and then a 14 gauge fuseable link.
the link was broken but not visibly burnt so i cut it and reconnected it to the terminal. when i put the battery back on it burnt instantly. where is that wire going to?