Voltage is fluctuating when engine is running. The interior lights show it flickering quite clearly. I have a new voltage regulator, is the alternator the next thing to change? If so, is there a larger one available that can be simply swapped out?
S
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If the new voltage regulator didn’t resolve it you likely have a bad diode in the alternator
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Grounds. It’s ALWAYS grounds.
Good point on grounds and power connections too. I was thinking the voltage was flickering higher than normal. If so, that’s a diode. If voltage is falling from normal charging voltage think power and ground connections
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It’s very normal to see some interior light flicker with the original electro-mechanical regulators.
No way to tell without a volt meter. Sounds normal.
I agree with mopauly1965, it’s always pore grounding
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