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Tom Wesenberg · 09-26-2012, 06:58 PM

The third brush only sets the amps and has no control over the voltage coming out of the generator. Therefore a poor connection in the charging circuit allows the generator voltage to rise to dangerous (for the lights) levels. Take any good running Model A without an EVR and lift the battery cable off while the engine is running and has the lights on and see what happens. With an EVR, it's no problem.

09-26-2012, 06:58 PM	#70
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Is There An Electrician In The House? The third brush only sets the amps and has no control over the voltage coming out of the generator. Therefore a poor connection in the charging circuit allows the generator voltage to rise to dangerous (for the lights) levels. Take any good running Model A without an EVR and lift the battery cable off while the engine is running and has the lights on and see what happens. With an EVR, it's no problem.