Battery could be bad and therefore not taking a charge. Alternator or regulator could be failing. Grounds might be failing, or wires could be loose.

If you have a one-wire alternator and are using a diode to fool it into working, its overcharging your battery, and the battery may have failed as a result.

I'd encourage you to move this question over to the electrical forum, and provide more details about your electrical system there.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...