Help tonight if possible

[E30SPDFRK]

My car keeps blowing the tach/temp gauge fuse. Like- the second I put it in it blows. I checked all of my wiring from where I spliced the harnesses together (m30 swap) to the c104 in the glovebox, but I found no shorts. I suck at electrical, so I don't know where to check next. Any help?


The reason I need this tonight is I need to drive to school tomorrow, and I have been having cooling system problems lately.

[Julien]

check the reverse wires that go down to the gearbox.. mine had stripped and grounded themselves causing that same fault

good luck
Julien

[E30SPDFRK]

Those are the ones that start under the shifter console and go through the shifter hole, right?

[E30_Pare]

yes. take out your shift boot and lift up the foam piece and you should be able to see a wire.

[E30SPDFRK]

The reverse wires on the top side of the car look fine afaict, I cant check underneath because it is snowing. Is there anything else it could possibly be that I can check from above in the meantime?

[Optimator]

Is 10 or 21 blowing?

[E30_Pare]

The reverse wires on the top side of the car look fine afaict, I cant check underneath because it is snowing. Is there anything else it could possibly be that I can check from above in the meantime?

Mine looked fine too, but then I pulled on the wire and I found out that it was cut in half.

[E30SPDFRK]

Is 10 or 21 blowing?

10

Mine looked fine too, but then I pulled on the wire and I found out that it was cut in half.

I tried pulling pretty hard and neither of them pulled up. There is a little nick in the casing of the brownish one, but it wasn't/isn't touching anything. I wrapped some electrical tape on it just to be sure anyways.

[E30SPDFRK]

Anything else it could be?

[digital_cowboy]

It could be a short in the wires down at the tranny.

[E30SPDFRK]

I got that.

I meant anything I could check from above.

[E30SPDFRK]

I checked the reverse wires the best I could this morning without removing the driveshaft or exhaust. I dropped the back support and looked them over, but I didn't see any signs of arcing or shorts.

The first 2 times the fuse started blowing, I had been higher up in the rpm range. I thought it may have something to do with the 4 cyl tach I have getting overloaded, so I pulled the tach out and tried to run it, but that made the car run like shit. I guess the tach completes some circuit?

[E30SPDFRK]

Any more help, guys?

[E30SPDFRK]

So I fixed the stumble (no gas to the pump while I had one side in the air )

I have no fuse in right now, so explain this: When I start the car, the tach comes to life for 3 seconds then dies. I checked the amps through where the fuse plugs in, but got nothing. There is 13.xx volts there though.

Think it could be getting power through the short for the 3 seconds before it dies?