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Pos. or Neg. ground?
Posted: Mon Apr 07, 2008 9:10 pm
by Conn
Working on our truck and trying to get the eletrical system working right. Should a early 45 CCKW be positive or negatve ground? My TM 9-801 says negative, but my GMC maintenance manual says positive. Want to get it right, your help is greatly appritiated. I know that a lot of 1940s 6-volt systems were positive ground. Thanks! Gordon and Michael
Posted: Mon Apr 07, 2008 9:22 pm
by dr deuce
A 1945 truck would be negative ground
Only early trucks were + ground
Posted: Tue Apr 08, 2008 1:32 pm
by Chris_M
My 1945 Jimmy has negative ground.
Posted: Tue Apr 08, 2008 3:24 pm
by John V Cliche
Conn
You can look at the data plate on the voltage regulator it will say/read pos or neg grd.
Also your coil will be wired to match as well ie; pos terminal ( on the coil ) to the points = pos ground or neg terminal to the points = negative ground
But as Dr Duece posted only the real early stuff is pos ground.
Hope this helps
John
!
Posted: Tue Apr 08, 2008 7:16 pm
by Conn
Thanks for the info. very helpful!
Gordon and Michael