I was dinking around with a 91 silverado and ended up shorting out the cig lighter by accident

well now the dome lights,cig lighter, and the radio all don't work anymore


tried to run a voltage test just to see if the cig lighter was even getting any juice and it doesn't look like it is

no fuses where blown either


what is going on here or how do I figure it out and how can I fix it

 

Try checking the fusible links down by the starter and/or battery.
You can usually tell by looking at them (melted looking insulator), but another way is a quick tug on the wire. If it's burned out it'll stretch or break apart.

 

Prescription 7,

Your '91 C/K may have an Underhood Electrical Center (UEC). There are fuses/breakers for just about all major loads located in the black plastic box. These vehicles eliminated the fusible links with that load center. I'm not sure when that started on the trucks.

 

Oh that's right. It'd have to be at least 88 since the last 88 Silverado I worked on had that.

 

wouldn't that stop everything from working?



the only problem right now is the radio (the lights for the rad still come on just no tunes or clock), dome lights and cig lighter...





also where the hell is this block thing you guys were talking about?


I ahve no clue about these trucks or where things are

 

Prescription 7,

If your truck has the UEC, it is likely near the firewall. Later trucks have them right near the brake booster, but cars have them on either side. Look for a rectangular black enclosure with a flat cover. The cover has a rather obvious clip on its edge, and opening it will reveal all kind of fuses and neat stuff.

Many later trucks actually came with spare fuses and a fuse puller stuffed into the UEC. If you have trouble finding it, just follow the biggest harness of wires toward the firewall. It's possible that the '91s didn't have it, but if JZA and I are right, it should be there.

 

found something that had a big black box over it with three screw like things on it

all that was in there was just a bunch of wires two fuses and what looks like a mounting block for all the wires

couldn´t find anything that was messed up in there though

 

Rx,

Some vehicles had a circuit breaker(s) in the fuse panel for the heavier loads, like the lighter, power seats, etc. If you find some rectangular aluminum cubes in your fuse panel, remove them and check for continuity or test voltage through the devices if you can access their terminals while plugged in. This is NOT the hazard flasher, but is smaller than those and rectangular - about 25mm X 10mm x 15mm deep/tall.