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bobss396 · 06-30-2020, 07:28 AM

The best way to check a charging system is with it running and using a decent VAT tester. Sun used to make a nice one years ago. I like to check alternator/generator output not at the battery but between the UUT (unit under test) and the battery, this gives you the true output.

Hot weather is tough on electrics, be it the starter or charging device. How old is the starter, is it a 6V unit? When in doubt have it rebuilt if it is more than a few years old. I have a couple of auto-electric shops by me that are great.

Is the system 12V negative ground? That is always my preference on old cars. How old is the harness? Those were pretty simple but have no fuse panels, just fuse holders. I replaced the old crumbling harness on my '59, went alternator (63 amp) and high torque starter.

06-30-2020, 07:28 AM	#9
bobss396 Senior Member Join Date: Aug 2014 Posts: 721	Re: starter or generator The best way to check a charging system is with it running and using a decent VAT tester. Sun used to make a nice one years ago. I like to check alternator/generator output not at the battery but between the UUT (unit under test) and the battery, this gives you the true output. Hot weather is tough on electrics, be it the starter or charging device. How old is the starter, is it a 6V unit? When in doubt have it rebuilt if it is more than a few years old. I have a couple of auto-electric shops by me that are great. Is the system 12V negative ground? That is always my preference on old cars. How old is the harness? Those were pretty simple but have no fuse panels, just fuse holders. I replaced the old crumbling harness on my '59, went alternator (63 amp) and high torque starter.