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90 na6 short to ground

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Old 12-11-2016, 03:31 AM
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Question 90 na6 short to ground

Okay well the starter solenoid is grounding, i have unplugged the wire from the solenoid and that side of the st sig fuse is no longer shorting, so from the other side of the st sig fuse which goes down the line to the circuit opening relay and on the way there it goes to #1c on the ecu and then goes to fire the coil for the circuit opening relay. sending the white and red out of the circuit opening relay so it can fire the fuel pump when the afm tells it too, the white and red is getting power from the ecu i believe to the crank angle sensor and mostly everything that needs power to make the engine run, so can anyone tell me a story of how they fixed the ground to taillight fuse with a st sig ground issue kicker? on top. gone over the whole harness, the dash is out. checked all the wiring everywhere literally. the short started at the starter solenoid signal fuse and went from there. ravaged the wiring somewhere but i cannot find the short to save my life. or maybe even tell me how the taillight fuse and the st sig have anything in common? looked at everything under the car aswell. is it because they use the same common ground? there are no relays plugged in, there is no ecu there is nothing plugged into the harness.
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Old 12-11-2016, 03:38 AM
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i'm kinda wanting to do something like this just to be done with it and rewire the car. but can anyone point me to a diagram of doing that kinda install. i'm more then capable of assembling the remade harness.just looking for somekind of direction on it.
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Old 12-11-2016, 12:09 PM
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Your post is very confusing, hence the 100 views and no replies.

If I had to speculate though, I'd say you have a short somewhere on the driver side sill, as that's where the harness goes back to the tail lights. You'll want to plug everything in to do any testing though. Also, the ECU is powered by the white wire with a red stripe, not the other way around. Make sure your fuel inj relay is working properly, that's where power for the white/red wire comes from, and yes, it's incredibly important for injectors, CAS, ecu, and coils.
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Old 12-11-2016, 09:22 PM
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Lmfao, i understand i dont make alot of sense sometimes my mind goes way to fast to type it all and make it understandable for everyone.

My problem is that i have a short to ground on st sig fuse on the violet wire side, my solenoid is internally damaged.
Which caused the violet wire side of the st sig fuse to short to ground (melted wires i'm guessing).

It also is in my tail fuse on the red/black side but not on the tns relay side (white/blu).

Details about when i say the dash is out, i mean that the dash is not present in the vehicle lol there is not a dash in the vehicle anymore (only the metal dash bar) which i can remove with 6 bolts. and dropping the steering column again. no ecu, no relays, no fuses, nothing is hooked up. no corner bulbs, no taillight bulbs. no radio, no ac, the whole harness has been disconnected. the cas is unplugged the headlight motors the cruise control is out the airbag module is out, literally everything is out of the car lol.

I have narrowed it down to the violet wire running to the circuit opening relay, and on the tail fuse, its the red/black side, which is not only the driver door sill side of the harness, it goes to the radio and alot of the illumination items aswell sadly, lol the room fuse is in that circuit somewhere but there is no short in that part of the harness which is the weird part. its the starter solenoid is damaged so i tracing back from there basically, and the fact that the aftermarket radio i installed was not compatible with the illumination system in the 90 na6. which i'm sure has alot to do with all my problems. but this is giving me the chance to remove a lot of the items i dont want in the vehicle anymore, and since i do wanna run the car at some events to begin with i rather just run a switch panel because the fan relays arent in use already, there is alot of things missing to begin with.

and would it be possible to use p-fets to run different systems in the vehicle being radio, fuel pump, etc dropping the relay circuits? i mean in theory it would work but adding that to my jumbled mess of a thought train lol.

Last edited by Joshua Scott Visor; 12-12-2016 at 08:46 AM.
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Old 12-14-2016, 02:03 PM
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i still dont make sense? lol shows how much is actually known about na01 wiring lmfao. its not my writing thats not understandable. its the fact nobody understands what parts of the car i'm talking about.
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Old 12-14-2016, 06:12 PM
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Originally Posted by Joshua Scott Visor
i still dont make sense? lol shows how much is actually known about na01 wiring lmfao. its not my writing thats not understandable. its the fact nobody understands what parts of the car i'm talking about.
Index of /garage/Wiring Diagrams/Wiring Diagrams 1990-1996/

Pretty sure it's you who doesn't understand. I made a simple infographic for you:

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Old 12-14-2016, 07:33 PM
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do you think i dont understand what i'm saying? lol look i am using those same diagrams you linked, the "violet wire" hence "vio" going out of the st sig fuses which is the starter signal to the starter through that fuse and back out on the other side to the circuit opening relay like in your "infographic" it is going to ground like i said. with nothing plugged into the harness itself. i'm not stupid, i was not planning on pulling out the dash then the ac/heater/blower to reach the whole harness to pull it out and see where the short is seeing that there is one in the tail fuse section that isnt apart of the taillight/fuelpump harness which could include abs if my car had it. but thats not this case. my problem is a short to ground in that violet wire, and in the one in the red/black wire of the tail fuse.

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Old 12-14-2016, 10:01 PM
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Did you unplug the ECM?
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Old 12-14-2016, 10:52 PM
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Originally Posted by hi_im_sean
Did you unplug the ECM?
under the dash on the passenger side yes. i call it a ecu my bad.
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