Major Electrical issue!!!.

[rb25drag]

Well I finished all my mods Friday, Put the front end back on, was fixing to take a ride when I got in turned the key on and BAM, everything in the car went off. WTF have never had this happen. So i check the fuses and I blew a 30AMP ignition fuse under the hood. So I replace the fuse and hit the switch and it blew the fuse again. So now for the fun part. Tracing wires. Long story short I traced everthing back to a Black/Red wire under the dash that runs all the accessories.

Now for the weird part. I have hooked an alligator clamp to the female end (receiving end) of the 30amp fuse link and I spark it from my solenoid for a 12v source so I can find the problem. Well randomly out of no were everything starts working again!! WTF i have not done anything. So thi has to be a short of some kind under the dash. Well out of no were it goes off again and blows my fuse again just like a power surge, Well I also notice my fuel pump isnt working now either. So I mess around under the dash trying to pull wires, fuses, relays, and everything starts working again!! So while its working I run my volt meter to the fuel pump and im getting 12volts to the pump but it still isnt coming on. So I pull the pump hook a direct 12volts to the pump and it comes on. So I hook my harness back up and it comes on again. WTF?? loose connection? So I put the pump back in the tank and plug it up. Turn the key on and Nothing!!!! We flick the switch a couple times and the pump comes on. So I decide to try and fire the car to see what it does. Half way through the start everything Kills again!!! So now Im back to square 1. I honestly don't know were to look or what to do.

Also We pulled every Fuse/Relay out of the car at once and put power to the ignition and it still sparks my wire BAD!!!

Anyone have anymore Ideas? I have worked for 12 + Hrs this weekend, Ripped half the dash out and fuse panel checking for burnt or discolored wires with No luck.

What I did find is the White wire on the ignition coming from the fuse panel under the hood has some Dis-color as if its been HOT! Which that is the power wire for the Black/red accessory wire. Which leads me to think the black/red wire is at some point pulling too much juice!! But what all does the black/red ignition wire run?

[Shocker]

think of anything small you might have touched/bumped/****ed up while doing work on your car. Check all of your grounds, Start with the wires you physically might have accidentally came into contact with first... wires do suck somtimes, I need to figure out why my windshield whippers arn't working lol.

[rb25drag]

Well We literally have went over everything possible. I think my next step is to just make my own fuse panel and re-wire the accessories I need.

[Shocker]

Well We literally have went over everything possible. I think my next step is to just make my own fuse panel and re-wire the accessories I need.

or just go stand alone clears a good deal of that up!

[USMCgetsome]

1st check your battery! check to make sure u don't have them on backwards. Seen this done plenty of times. I've even done it myself. Next, i'm sure an accessory is not wired properly. Check all of them.

[rb25drag]

Well the battery is not wired backwards, I never touched it since I put my motor back in and its ran fine for a few weeks now. also All of my Extra accessories such as my gauges and such is wired separate into a solenoid and a relay bank i put together. Its a factory wire shorted some were that I can't find.

Everything was fine until I put my fenders on, My girlfriend was helping me and she left my key on, 30-45 mins, During that time something fried. Cause as soon as I was ready to start the car and pull it out of the garage I had No ignition and No power to anything inside the car.

Does anyone have a wiring diagram for the fuse bank under the dash on the driver side? 1990 s13.

[240z4u]

Bummer man, so you were putting your front clip back on your car when all hell broke loose?

My thoughts, are to but a meter from the leg of the fuse that goes to the internal harness to ground. Have someone watch it and start jostling around your harness.

Start where it passes through the firewall, and the fenderwell area!

Good luck man.

Evan

Do you have an aftermarket alarm/keyless entry? If you do its tied into that wiring.

[rb25drag]

Ya basically thats what happend. So I guess my lady didn't like me putting her clothes on!!! LOL

I have tested the wire From the fuse panel under the hood into the firewall and to the ignition switch. I can Clearly see the White Power wire turning colors from were it has been Hot at some point in time. But that wire supplies power to the Black/Red ignition wire which is pulling too much from something. I cannot find exactly were it goes under the dash. B/c there is about 6 Black/Red wires under the dash and there all the same gage wire. Also since its a accessory wire I can hook my volt meter to it to check for Contenudity and anything grounded will peg my meter.

I need a diagram of exactly what that black/red ignition wire runs.

[Shocker]

oh noes?! you never disconnected the battery while working on your car?! Bad idea... I learned my lesson the first time around, when I arc a ratchet in my hand with the 12v on the alt to the frame rail....... While blowing a 12 dollar fuse that took out my whole car.

you most likely arced something and its fired somewhere. I figured out my electrical issues last night. Fixed my windshield whippers and radio/speakers!

Get the volt meter out and start checking, go through the FSM for the 240 and trace wires... it sucks but works with time.

[rb25drag]

I always dis connect the battery when Im working on my electrical stuff. Never to put fenders on tho!!

[Shocker]

I always dis connect the battery when Im working on my electrical stuff. Never to put fenders on tho!!

hmm yeah, I started doing it with everything lol, I've got expensive ECU/IGN box, and coils that I'd prefer not to fry.

[rb25drag]

I found this wiring Diagram I think this will help me!

http://img167.imageshack.us/im...8.jpg

The only problem is I don't have a radio, Power antenna, or seat belts any more. So alot of my accessories has been already deleted.

[Shocker]

I found this wiring Diagram I think this will help me!

http://img167.imageshack.us/im...8.jpg

The only problem is I don't have a radio, Power antenna, or seat belts any more. So alot of my accessories has been already deleted.

That might help, what helped me was testing my fuse panel with the volt meter when I'd turn an accessory on, this gave me a starting place to see if voltage was reaching it or not.

[rb25drag]

Well I have ran that test. The problem is The accessory wire thats bad runs ALOT of things.

We took Every fuse and Every Relay out of the car hooked up the power and it started smoking my alligator clamp Still!!! What ever it is has some Juice. So its def a wire fried. Its just a matter of ripping the dash out and finding it.

[rb25drag]

Well I ran new 12 gage wire to my fuel pump tonight and so Far my problems have went away. Not sure how long it will last. Im assuming my Stock fuel pump wiring took a dump and possibly caused this problem. Will see if I can drive the car tom.

[s13_240_rb20]

This is just a silly guess, but I remember the headaches I suffered when I first did my original wiring:

Disconnect the Black/Red wire from the white wire. Then use your voltmeter to probe the NEG battery terminal and BOTH of those wires seperately. I am pretty sure that Only ONE of these wires should have voltage with the key on. If so.....

While they are still seperated, check both wires seperately for continuity to ground.

I am only wondering if you are overlooking the problem because it lies in that area known as "That is perfectly right, so the problem has GOT to be over............".

Keep a good eye on your digi-meter while doing all your testing. One safe bet, but loooonnnnggg test, would be to check for continuity to chassis ground on those wires (connected), and wiggle EVERY wire that it goes to, but you HAVE to make sure that you are watching for changes on your meter while you are wiggling. This is a pretty safe test since you should have your battery completely disconnected.

--TJ