Cadillac & LaSalle Club Discussion Forum

Cadillac & LaSalle Club Forums => Technical / Authenticity => Topic started by: 39LaSalleCaddad on September 21, 2017, 05:21:09 PM

Title: 39 Lasalle positive or negative ground?
Post by: 39LaSalleCaddad on September 21, 2017, 05:21:09 PM
Car has problem with charging system:

Question has come up at the shop is a 39 Lasalle a positive or negative ground?

Always thought all American cars were negative ground.

Thx!
Title: Re: 39 Lasalle positive or negative ground?
Post by: Steve Passmore on September 21, 2017, 06:03:36 PM
If it's wired as it left the factory it's Positive ground.
Title: Re: 39 Lasalle positive or negative ground?
Post by: 39LaSalleCaddad on September 21, 2017, 06:23:01 PM
Holy crap I had no idea!
Title: Re: 39 Lasalle positive or negative ground?
Post by: 35-709 on September 21, 2017, 08:25:25 PM
Cadillac was positive ground until 1946, 12 volt came in 1953.
Title: Re: 39 Lasalle positive or negative ground?
Post by: tripwire on September 21, 2017, 09:26:02 PM
Did you buy a voltmeter yet?
Title: Re: 39 Lasalle positive or negative ground?
Post by: 39LaSalleCaddad on September 21, 2017, 09:27:16 PM
Yes I did a Bosch
Title: Re: 39 Lasalle positive or negative ground?
Post by: tripwire on September 22, 2017, 08:51:24 AM
Sounds good.  That will be a great help trying to diagnose your electrical issues.  Way better than throwing parts at a problem until either your wallet is empty or you've finally stumbled over the problem.