Melting Neg. Wires /TempGauge pt III

[SHOOFF508]

So i believe i finally located the cause of my temp gauge issue, the main ground that goes to the negative battery terminal, then to th fender, then to a plug/harness that if unplugged the car wont run, i found it melted/melting.

i can the car for 1 minute and found both that and the main negative cable to be HOT AS ****.

tomorow at work im gonna toss the midtronics at her and check out that alternator cuz i think somethings cooking.

any suggestions on the problem or maybe im going down the right track ?

 

[SHOZ123]

The only reason the ground cable would be too hot and melting is because of high resistance. Sounds like the ground system needs ripped out and new wires installed.

 

[SHOOFF508]

yeah, the charging system checked out OK and so did the battery. so i guess i might have fryed wires.

 

[mercman69]

Ground problem

I would check all ground connections for corrosion on loose connections.For ground wires to melt there has to be a dead short to ground on a hot wire.Is the main battery ground cable melted?

 

[SHOZ123]

No, with DC current anything that goes out (+) has to come back (-)( some will argue about this direction wise). So the grounds are as important as the hot wires.

Any corrosion of the ground circuit on a DC system will create a higher resistance and reduced + voltage output (to the input).