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Electrical short, now dead truck

1.7K views 7 replies 4 participants last post by  oldeerslayer  
#1 ·
I was under the hood of the truck trying to track down the wiring for the A/C compressor and a live hot wire bumped the pulley of the compressor. (Stupid mistake, I know.) The key was off during this.

When I tried to start the truck, I got nothing, no chime, no lights, just a general nothing. I checked the battery voltage and it's good. I checked the fuses in the fuse panel and those are all good. I unhooked the battery for a minute or so, reconnected it, and was able to get dash lights and the vent fan worked. When I tried to start the truck, it all went dead again and wont start back.

With a multimeter on the battery while the cables were attached, I could see the voltage falling. 12.76,12.75, 12.74... at a pace that you could count with. Way too quick.

Is there a fusible link on these trucks? (1997 2.2 L) I found a single wire running to a connector from the hot terminal into what looked to be a fusible link but it could also just be a big wire. I'm stranded now until I get this sorted so is there any help for this?
 
#7 ·
The bus was unbolted from the fender, so no wonder I didnt see it. Its attached now but theres no voltage to the bus. The links at the battery are good. It doesnt make sense that it would start yesterday and then it not do anything today. What would come and go like that with no vibration in between.

I even ran my obd2 scanner on it last night while running and it showed the only code is low voltage on the crank sensor.
 
#3 ·
I fried my "nice" multimeter trying to troubleshoot it, and even got some smoke from the truck itself. That was inspiring.

If the big chunks I was checking are fusible links, they're good. I tried the truck before checking them and it was dead. I tried it after checking them and it started. I got it to start twice. I still have no idea what the issue is and if/when it will resurface so I need to find it all the same.

I couldn't find the Buss you were talking about on my truck. I wonder if they changed them between year models? This truck is a hot mess of cobbled together stuff from previous owners so it very likely could've been there from the factory but the PO felt like doing away with it in lieu of a wad of tape.
 
#4 ·
if you are getting a restart after a dead short like you describe- you need to check ALL the grounds- battery to fender- battery to frame - frame to fender- battery to engine and the two smaller ground off the back of either side of engine
 
#5 ·
I checked all the wiring except for the wiring behind the engine. Everything visible was good. The arc was maybe 2 strands inside of a 16ga wire for a fraction of a second. By the time it started, it was over. Hopefully nothing cooked too bad in that time. I will check it more thoroughly this afternoon or tomorrow, as long as it starts next time. If it reverts back to being dead, obviously something drastic is needed.