Author Topic: 39 Lasalle positive or negative ground?  (Read 880 times)

Offline 39LaSalleCaddad

  • Posts: 28
  • Name: xmatos
39 Lasalle positive or negative ground?
« 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!

Offline Steve Passmore

  • Posts: 5768
  • Name: Steve Passmore - Sadly Deceased
Re: 39 Lasalle positive or negative ground?
« Reply #1 on: September 21, 2017, 06:03:36 PM »
If it's wired as it left the factory it's Positive ground.
Steve

Present
1937 60 convertible coupe
1941 62 convertible coupe
1941 62 coupe

Previous
1936 70 Sport coupe
1937 85 series V12 sedan
1938 60 coupe
1938 50 coupe
1939 60S
1940 62 coupe
1941 62 convertible coupe x2
1941 61 coupe
1941 61 sedan x2
1941 62 sedan x2
1947 62 sedan
1959 62 coupe

Offline 39LaSalleCaddad

  • Posts: 28
  • Name: xmatos
Re: 39 Lasalle positive or negative ground?
« Reply #2 on: September 21, 2017, 06:23:01 PM »
Holy crap I had no idea!

Offline 35-709

  • Posts: 5364
  • The most valuable antique is an old friend.
  • CLC Number: 4719
  • Name: G. Newcombe
Re: 39 Lasalle positive or negative ground?
« Reply #3 on: September 21, 2017, 08:25:25 PM »
Cadillac was positive ground until 1946, 12 volt came in 1953.
1935 Cadillac Sedan resto-mod "Big Red"
1973 Cadillac Caribou - Sold - but still in the family
1950 Jaguar Mark V Saloon resto-mod - Sold
1942 Cadillac 6269 - Sold
1968 Pontiac Bonneville Convertible
1935 Glenn Pray - Auburn Boattail Speedster, Gen. 2

Offline tripwire

  • Posts: 310
  • Name: Wes Paro
Re: 39 Lasalle positive or negative ground?
« Reply #4 on: September 21, 2017, 09:26:02 PM »
Did you buy a voltmeter yet?
Driving now:
2013 CTS4 Performance Coupe
1940 LaSalle 5229 C4D

A few I used to drive:
1976 Cadillac Ambulance
1969 Cadillac Hearse, Superior Body
1966 Buick Wildcat Hearse
1957 Ford Thunderbird x 3, 1 E code, 2 D code
1956 Oldsmobile Rocket 88 Sedan
1949 Mercury Convertible
1949 Mercury Coupe, Mild Custom
1936 Buick Special Sedan

Offline 39LaSalleCaddad

  • Posts: 28
  • Name: xmatos
Re: 39 Lasalle positive or negative ground?
« Reply #5 on: September 21, 2017, 09:27:16 PM »
Yes I did a Bosch

Offline tripwire

  • Posts: 310
  • Name: Wes Paro
Re: 39 Lasalle positive or negative ground?
« Reply #6 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.
Driving now:
2013 CTS4 Performance Coupe
1940 LaSalle 5229 C4D

A few I used to drive:
1976 Cadillac Ambulance
1969 Cadillac Hearse, Superior Body
1966 Buick Wildcat Hearse
1957 Ford Thunderbird x 3, 1 E code, 2 D code
1956 Oldsmobile Rocket 88 Sedan
1949 Mercury Convertible
1949 Mercury Coupe, Mild Custom
1936 Buick Special Sedan

 

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