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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jul 2012 Posts: 10 New Guy | | New Guy Joined: Jul 2012 Posts: 10 | Muddling through a lot of threads and i'm a bit confused. I have a 51 GMC 150. 6V positive gound. Just got the truck and i'm trying to sort out a lot of previous owner electrical messes. He put in a ballast resister and from what i think i'm reading in the threads, i don't need, nor want this for a 6V system. Is that correct? It's very very hard to start this beast and between the reverse polarity (he had it hooked up negative ground) , backwards wired coil, no connection to generator i can't believe i got it going at all. should i remove the ballast resister that he put in? | | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | No need for a ballast resister on a 6V system. | | | | | Joined: Feb 2004 Posts: 29,865 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,865 | Yes! Remove the resistor, and get the charging system working! When the starter is running, you're probably down to 4.5-5 volts at the coil primary, even without a resistor. No wonder it's hard to start!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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