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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 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | revted47,
My unprofessional first guess would be the voltage regulator is on the fritz. The second guess, and a little less likely would be the generator...the brushes could be worn down and bouncing or the commutator could be funky with carbon.
I would have my assistant start and rev the engine to duplicate the problems while I held a hose or some type of listening device on the voltage regulator cover. If this is the problem, you might hear 'ticking' that coincides with the jumping ammeter.
Stuart | | |
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