Quote:
Originally Posted by Triple Jim
It depends on how it varies with speed. If it gets a little brighter when you go from idle to a little higher RPM, that's normal. If it continues to get brighter with further increase in RPM, that might indicate a failed regulator.
Measure the battery voltage at various engine speeds to see if it stays steady around 14-ish volts, except for a little drop at idle.
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Not having to remove the seat, I connected to one of the wires (probably) connected to some rear light. Before starting the engine I read about 11.5 V. After starting it, it seemed to stabilize at around 12.8 V, when increasing the RPMs well above idle. Guess the positive / + voltage should be more or less similar for any rear bulb as at the battery (?).
Just tried it..
I had expected a higher voltage, more like 13-14 V...