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Author Topic: Positive or Negative Ground?  (Read 66 times)

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Offline Vincent

Positive or Negative Ground?
« on: November 21, 2019, 02:21:42 PM »
I took my Starter and Generator, 1953 CJ3A, to a local guy for rebuild and he asked me if it is Positive or Negative grounded.  I assume it is negative grounded like other cars, but I can't find any definitive information on that.  I have found many posts on other sites where they say their's is positive ground.  Can any of you clear this up for me.  I am looking to make it original. 
Vincent S.
vschleg@yahoo.com

Offline BillT

Re: Positive or Negative Ground?
« Reply #1 on: November 21, 2019, 04:28:50 PM »
Battery (-) post, does the cable connected to it attach to the frame? Yes, then it's a negative ground.
'52 CJ3A, early M38A1, '70 Commando
25' travel trailer, Lance 855S truck camper
Love to camp

Offline Forum Master

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Re: Positive or Negative Ground?
« Reply #2 on: November 21, 2019, 07:35:04 PM »
He should ask you what type of generator do you have?

Read this;  http://www.cj3a.info/tech/charging.html
Willys is better then Ford! Proove? They don't stample their parts for warranty.

The quality of the forum is made by the quality of the forum's people itself.

Offline BillT

Re: Positive or Negative Ground?
« Reply #3 on: November 22, 2019, 08:33:19 AM »
Thank you for the great info. It's added to my library.
'52 CJ3A, early M38A1, '70 Commando
25' travel trailer, Lance 855S truck camper
Love to camp

Offline Vincent

Re: Positive or Negative Ground?
« Reply #4 on: November 22, 2019, 08:57:07 AM »
ok, so this is the original gdz6001 generator.  When I dragged this jeep out of the field, there was no battery or cables.  I am restoring it to original stock condition.  Does anyone know if it was originally negative grounded or positive grounded?
Vincent S.
vschleg@yahoo.com

Offline Rus Curtis

Re: Positive or Negative Ground?
« Reply #5 on: November 22, 2019, 09:57:37 AM »
Vincent,
Do you have any documentation for your vehicle in your library:  Service Manual (SM), Parts Manual (PM)?

Having required reference material will greatly help you weed through the, "many posts on other sites," so that you may know what is correct.

Here's a link to an image of the wiring diagram. 

https://www.cj3apage.com/index/Tech_Tips/wiring%20diagrams.htm

I have hard copies of SM and PM but if you're comfortable with internet searching, Google is your friend.  This search was simply, "CJ3A Wiring Diagram."

The book, The Civilian Jeep Model CJ-3A, by Bob W. has a copy of the CJ-3A wiring diagram in it too (p.23, illust. 3.04) clearly labeling, "Ground Negative Cable," that matches #8 of the wiring diagram in the link I provided.

HTH.


« Last Edit: November 22, 2019, 10:05:20 AM by Rus Curtis »
'54 CJ-3B "Green Gruntt"
Bantam T3-C

Offline Vincent

Re: Positive or Negative Ground?
« Reply #6 on: November 22, 2019, 10:01:20 AM »
Got it. Thank you.
Vincent S.
vschleg@yahoo.com