need to know whether this is positive ground or negative ground

 

We need to know what year and model car?

 

i'm obviously a newbie to any forums...lol... it is a 1951 oldmobile rocket 88 303 v-8 with hydramatic transmission thanks !

 

My guess would be a negative ground as all the later models were of that configuration but if you don't get a definite answer here post this on the vintage forum (that is where the early Old's owners live) and for sure someone will have a answer for you..... Welcome to Classic Oldsmobile. Pictures of your ride are not manatory but certinly appericated... Tedd

 

back in the day we used to use an 8 volt battery and adjust the regulator to have more voltage. The car would start much faster and the lights would be much brighter.

 

It should be negative ground.

 

It is a negative ground. Most positive grounds were FoMoCo products.