Hey guys,

Just finishing up my restoration of my 944... car has been running and driving the last week after a lot of electrical gremlins.. finally got the horn working and went to take it on a test drive... lots of smoke started billowing from behind the dash, turned the engine off, and no dice, pulled the battery and of course that didn't work, so pulled the injector harness. By this point the smoke had died off (because all of the pic sleeving had melted completely away from the wire causing it).

Turns out it was the wire between the Grey/Black wire between the Light Switch and the Parking Light Switch.

Can anyone help me diagnose this. I'm presuming some kind of short must have kept the ignition switch circuit live from the wrong side which prevented the ignition from going off but I'm no electronics expert so any pointers would help as I can't see how or where the short would have originated.

I have attached pics and a wiring diagram that shows the melted wire.

 

SOLVED.

MOMO'S FAULT....I have a momo hub adapter for my lovely prototipo steering wheel, and it it the first time the car was being driven at night.

The blinker prong on the back has some casting junk on it which meant it effectively grounded that live strip and superheated the wire attached to it.

See pics:

 

Good catch. Electrical is the worst.

 

Were you ever able to get a fix for this? I’m having the same exact problem. Do you just shave down the metal part to stop it contacting?

 

FYI. The original thread is from 4 years ago. I am planning on installing a nice Momo wheel and hub adapter on my sons car so any other members who have installed these Momo hubs can chime to let the rest of us beware of any fixes so we don't suffer the same charred fate like the OP.

Thank you!!!

Ted V.

 

I see that, just a hopeful call in the dark! Mine had the issue, compare the length of that prong on the new back of the new MOMO hub with the length of the OEM hub. All I did was cut mine down to the same length (Oem prong is .5 inch I think, i just eyeballed it)and it seems to have worked. Can provide images if you would like. I have yet to really drive the car, as it took the coating off of some wires, don't feel like bursting into flames on the highway yet. I think this fix will work though.