Electrical issue

[BanginGMC 23]

Okay, so i think i fucked something up in my 86 GMC S-15 that deals with electrical, go figure right..

Everything was working perfectly, then.. i connected my (2) D3100 XS Power batts with (2) runs of 0AWG wire (pos n neg) and something (idk what) happened and this is the results...

I started my truck (got low voltage) and my Head Unit didn't turn on, along with amps.

I put a test light on my 15amp Radio fuse in my fuse box by my kick panel and no power, so i pulled it and it wasn't blown but i replaced it anyway.

Then put a test light on it and still no power.

I pulled my Head Unit to check the factory 10amp fuse and i got the same issue, no power but not blown.

On my fuse box by my kick panel theres about 10 or more fuses... and around half, when i put the test light to it, it doesn't light up.

I replaced a 10amp fuse in the box that had no power (fuse wasn't blown again) and still got NO POWER!

What happened?

[cheese20323 13]

Maybe try getting some small wire directly from the batt to the HU.....

[bassahaulic 155]

Hmmmmm. You killed it.

[shizzzon 461]

check your alt to see if it's putting out anything.

If it's not, pop fuse box and check alt fuse turn on fuse. It should be around 10A or less

Replace this with a 15A fuse

Next, check ground on headunit and also remove the turn onlead from the stereo if it still doesnt turn on to see if that helps.

[sefugi 166]

You would have to check but I think on the mid '80s models there were fusible links at the starter that feed certain circuits may one that burnt. If you start to look at them make sure all bats are disconnected. Don't have access until tomorrow but if I new all the fuses that were dead I could probly tell ya what they feed from. GL

[shizzzon 461]

i forgot to say why...

Replace alt fuse ONLY if it's popped. If it is u replace with higher because typical HO alts pull more exciter current.or whatever it's called.

[BanginGMC 23]

Hmmmmm. You killed it.

It as in?

check your alt to see if it's putting out anything.

If it's not, pop fuse box and check alt fuse turn on fuse. It should be around 10A or less

Replace this with a 15A fuse

Next, check ground on headunit and also remove the turn onlead from the stereo if it still doesnt turn on to see if that helps.

Check it with a DMM or test light?

I'll go out now and look for that fuse now, check the ground and remove remote wire.

[shizzzon 461]

just check fuse for alt turn on.

Also, i'd only recommend removing remote turn on if stereo still doesnt turn on after ensuring the ground is secured.

I would get a dmm and check 12v constant on to make sure it's there at the headunit

Also, check the ignition wire too once key is turned over to make sure that wire is reading right too.

[BanginGMC 23]

You would have to check but I think on the mid '80s models there were fusible links at the starter that feed certain circuits may one that burnt. If you start to look at them make sure all bats are disconnected. Don't have access until tomorrow but if I new all the fuses that were dead I could probly tell ya what they feed from. GL

I dont think i saw any fusible links when i installed my starter a while back, but i'm not even sure what they look like.

[sefugi 166]

fusible links at the starter Looks like a regular wire but a little spongy(softer) works similar to how a fuse works. If one is burnt you should be able to tell by lookin closely

[BanginGMC 23]

just check fuse for alt turn on.

Also, i'd only recommend removing remote turn on if stereo still doesnt turn on after ensuring the ground is secured.

I would get a dmm and check 12v constant on to make sure it's there at the headunit

Also, check the ignition wire too once key is turned over to make sure that wire is reading right too.

im not seeing any alt turn on fuse, although some fuses have partially faded names... i'll just check all the fuses.

Checking wires now..

[BanginGMC 23]

i checked my ignition wire and no power..

ground is good

[BanginGMC 23]

fusible links at the starter Looks like a regular wire but a little spongy(softer) works similar to how a fuse works. If one is burnt you should be able to tell by lookin closely

looking now

[Duran 387]

Do you have a fuse box under the hood?

[BanginGMC 23]

Do you have a fuse box under the hood?

No.

[BanginGMC 23]

Found the problem guys! it was the power wire running from the head unit to the batt. It got sliced SOMEHOW i have no idea how but i ran new wire and relocated it

Thanks everyone!!!

[Shogen 325]

good to know... happy your back to beatin' that truck.

[emh9009 199]

stupid stuff like that just pisses you off. "how the hell did that happen?!" glad you found your easy fix, and got your beat back.