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Old 06-17-2021, 04:22 PM   #5
pbsurf
Veteran Member
 
City: San Diego
Vessel Name: Inara
Vessel Model: Grand Banks 42 classic
Join Date: Jul 2018
Posts: 46
When port engine, with warm alternator, runs, it's amp gauge reads 0. When the starboard engine runs, it's amp gauge reads 30. Good reason to remove port alternator. New issue is that the battery selector switch doesn't turn power off. My bro recommends disconnecting the negative terminal of each of the 3 batteries. Then remove the power wire from the alt and tape it off. Then reconnect terminals for 12V power for, lights and fresh water pump. The battery selector switch has 4 positions - OFF 1 ALL 2. It has always been set on ALL. I have 3 batteries connected to a Charles 30 amp charger. Engines start in all 4 positions. 12V power does not work in OFF.
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