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Just go to Harbor Freight and buy one of their battery load testers. I use mine all the time. Just hook it up to each batteries +- ONE at a time, no need to disconnect any cables.
Voltage should be in the green the flip the switch left or right and hold for a few seconds or until the massive resistor inside looks like it going to melt and see if the gauge drops to the left. If it does it is bad. If it stays to the right the battery is most likely good. I just checked my second Deuce yesterday and both are bad......
Voltage should be in the green the flip the switch left or right and hold for a few seconds or until the massive resistor inside looks like it going to melt and see if the gauge drops to the left. If it does it is bad. If it stays to the right the battery is most likely good. I just checked my second Deuce yesterday and both are bad......