Wiring Gurus

[wattsupbr86]

I have a wiring problem that i am trying to narrow down would like another opinion to help solve this. 87 gts coupe wont start keeps blowing engine fuse and have continuity between pos and neg terminals remove engine fuse there is continuity between both there and ground yadda yadda i found that if i remove the white plug on the junction box on drivers side kick panel it stops now im trying to figure out where that plug goes thanks in advance

[jondee86]

Sounds like an alternator problem. Try unplugging the round plug from
the alternator and see if the fuse still blows ? If the fuse doesn't blow,
get your alternator tested, or try another one.

Cheers... jondee86

[wattsupbr86]

ive done that its not it and also the engine fuse has ground on both sides

[jondee86]

Did you check the wire from the engine fuse to the IG pin on the
alternator plug ? You could have a short to ground on that wire.



With the ignition OFF, you should not have any power on the engine
fuse. The supply side is grounded until the key is turned ON. Pull the
ENG MAIN RELAY to figure out which is the supply side. So with the
fuse out and the key OFF, one side of the fuse holder will be grounded
and the other side not. If you have ground both sides, check the
alternator plug IG pin for a short to ground with the fuse out. That
would seem to be the most likely wire to have a short, as it moves
around the most when the car is driving.

Cheers... jondee86

[morgan]

I had a very similar problem, but my fusebox melted and drained the battery instead of popping a fuse. Had to keep the plug out. Turned out my alternator had an internal short. Unplug the round plug and the single wire. That single wire goes directly to the positive terminal. New alternator and i was good to go...new fuse box as well but that was another problem

[wattsupbr86]

thanks guys i thing i got it down to the alternator wire or the plug on the fuse box now my problem is car turns over starts and dies after i release the key.... fml... corolla life lol

[jondee86]

... now my problem is car turns over starts and dies after i release the key....

Usual reason is that the engine is running on the cold start injector, and
the cold start injector is only active when the engine is cranking. Check
that you have 12V at the main injectors when the key is ON.

Cheers... jondee86

[wattsupbr86]

There is power to all

[wattsupbr86]

Ok after searching and jumping afm the diag plug etc it realized that my CEL dosent go off when I let go of the key

[jondee86]

When you opened the flap in the AFM, or jumped the FP test plug
and turned the key ON, did you hear the FP running ?

Cheers... jondee86

[wattsupbr86]

quick update i have traced it down to no signal from the wire at the distributer (G-) and the NB i think it is

[jondee86]

You need to check the wires just where they leave the distributor. That
is where they get the most movement, and it is the most likely place for
a break to happen. Look for soft spots in the wire, any place where the
wire might have rubbed on and edge and be shorting to ground. Check
the plugs are making good contact and have no bent or broken pins.

Cheers... jondee86

[wattsupbr86]

UPDATE car is running now thanks to MAX my issue was the igniter i guess it wasn't allowing the signal to pass through