Battery+--->Ammeter----->Headlight bulb------->Battery-
A center zero ammeter like our trucks have will work either way.
With the headlight on it should twitch to one side or the other.
Hook up the leads on the ammeter so that it shows discharge when
the headlight is on. This is the polarity you need.
As to the positive ground, others are more expert on this but I believe
some AD and early TF GMC's had positive ground.
Bruce K
57 3200
Mt. Iron, MN
At Monday, 30 June 2003, you wrote:
>Hi - What is the easiest way to determine which is the positive
terminal
>for the ammeter?
>It is currently not hooked up at all, and there are no markings.
>The vehicle is a 12 volt converted '51 Chevy 3100.
>Also, were these trucks always negative ground?
>Thanks in advance, Rob
>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
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oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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