1996 Chevy Blazer 6 cyl Four Wheel Drive Automatic 120000 miles
My son's 1995 Chevy Blazer is frying alternators. This started when the transmission needed to be rebuilt (another story :) ). Put a new alternator in and it fries shortly there after. Have a Haynes manual but cannot figure out what is going wrong. This connections from the alternator are two wires of the plug that go to the dash charging gauge. These seem to test out okay and when the alternator is charging, it shows about 14v. Off the main terminal on the alternator, one wire goes back to the positive on the battery. There are two other wires off the same terminal that go into the main wiring harness never to be seen again.
The Haynes manual does not show these two. I have a feeling it is somewhere in these two that the problem lies. I had the boy make sure the ground from the battery to the engine block is good (cleaned block area with sand paper), but I'm at a loss to figure out where the problem could be.
The local Chevy dealer says the problem is that the wiring harness was being shorted between the firewall and the transmission block. So the transmission guy rerouted the wiring harness and found a bent connector but last night a new alternator in and poof, toast.
It would be really nice to be able to test this out before toasting another alternator. Advanced Auto is getting a little upset with the returns :)
Any help will be greatly appreciated.
have the same problem?
Wednesday, May 7th, 2008 AT 10:40 AM