electrical short

[blzrgb]

86 cucv. short on front battery seeming to be coming from drivers side alternater. drains the battery but not the rear one. you can unhook the drivers alt. an the short dissappers. is it the alt. or some where in the wiring.

 

[mangus580]

Sounds to me like its the alternator. Take it off, and have a shop look at it for you. Its a standard GM alternator with an Isolated Ground. Make sure they are aware of the Isolated Ground part. Any good shop should know this already though...

 

[pauly]

I'm shorted too!

So im having the same problem, but the pos. wire that comes off of my passanger side alt is 24v and on the other side of my fusable link its 12v but if i replace the link it welds my neg bat. terminal on the batt by the busbar
ive been to GM peterbuilt for guidence on my electrical didnt have any luck. do you know what the wire that connects your top bus bar to your bottom bus bar is called or what it is used for or does

 

[mistaken1]

Download the -20 from CUCV wiki and look at the wiring diagrams.