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maillemaker's avatar
maillemaker
Explorer
Jan 16, 2020

Need help replacing charging circuit solenoid.

Last weekend I was driving down the road and my voltage started dropping off while driving. I assumed I had a bad alternator, so I stopped and bought a new one and replaced it, and it did not help. ...
maillemaker's avatar
maillemaker
Explorer
Jan 18, 2020
enblethen wrote:
How much time between starting the rig and the voltage going up?
It could be the chassis battery had to come up a little before circuit board allowed relay to energize.
Try to locate the battery control circuit board and post number.
You may be OK!


I replaced the alternator, and then started the engine. Volts showed about 11.6V as I recall on my cigarette-lighter voltmeter.

I got out of the cab, whacked the solenoid, and came back, and it was showing 14V.

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