alternator is blowing the engine harness fuse!

[bigtommy]

Went to start the valiant today and my main engine harness fuse blow. I searched and found the alternator wire is blowing the fuse. So I. Unsrewed the wire and it doesn't blow now so is it in the wire or the alternator itself? Its a newest alternator. The wire when it is hooked up blows the fuse as soon as I turn the kill switch on. I looked throw the harness, there is no bear wire showing so have no clue. Please help.

 

[67Dart273]

What kind of alternator? One wire? Mopar? ?????

If it's an external regulator type (like factory Mopar) you either have a broken insulator at the output screw, or "bad stuff" wrong in the alternator, IE bad diodes, etc

If this is an internal regulated and or "one wire" setup, it could be something lesser wrong, IE "diode trio" (in some) or bad regulator. And of course it still could be as above.

 

[bigtommy]

its a auto zone alternator. one big power wire and one green one. so i think thats a one eire alternator. i have all brand new wiring stuff. like coil, orange box, dizzy, volts regulator. ect.

 

[67Dart273]

Output stud plus one field connector is the 69/ earlier style

A "one wire" is what is commonly called an alternator that only has an output wire, literally "one" wire.

I'd say you have an internal short. Unless you are in love with the looks of the old style, ask for one for a 74 or so, and make CERTAIN it's a "squareback" instead of the older "roundback." Make up a jumper to ground one field, hook the other field terminal to your green regulator wire and off you go

The one on the left is what you want, it's better at low RPM