Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 04-27-2014, 05:43 PM
jims68ragtop's Avatar
jims68ragtop jims68ragtop is offline
Member
 
Join Date: Dec 2005
Location: Sheridan, Indiana
Posts: 67
Default 1968 Lemans engine wiring problem

Hi,

A couple days ago, I was driving my '68 Lemans and there was a very loud pop that sounded like an electrical short in the engine compartment. Smoke rolled out of the engine and I had to tow the car home. On the driver's side of the engine, there is a bundle of wires leading from the cowl to the alternator and some go down to the starter. The medium sized wire leading from the alternator to the starter was burned in two a few inches from the starter. This wire had been so hot that it melted some of the insulation off of the wires that are harnessed together with it and all of the insulation burned off the broken wire. I am just starting to dig in to figure out what happened and I will be replacing the burned wires soon. I pulled off the starter to check things out. The large starter solenoid stud nut was loose (the one that tightens against the solenoid housing). The wire that burned in two is the one that attaches to the large starter solenoid stud along with the positive battery cable. The battery cable is unharmed. At the alternator, the stud that the burnt wire attaches to also had a loose nut (again, this is the nut that tightens against the alternator housing). These nuts were not loose when I installed the starter and the alternator. I am guessing that the extreme heat running down the burnt wire may have loosened these nuts somehow.

- Any ideas what might have shorted to cause this?
- Do you suppose that there is damage to the starter or alternator?
- How do I check starter alternator for damage?

Thanks, Jim

 


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:48 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017