Easter3:


Firedog91902 points out a good test that I had forgotten: If everything is connected normally on the bike, except that the charger is connected to the big connector on the battery, the controller display should come on when the charger is turned on. Please verify whether your system does or doesn't behave this way. You can start another charge cycle, it won't hurt anything. If the controller does light up, it is possible that the power button on the controller has some issues. I have one controller that I have to press REALLY hard on the power button to get it to come on.

I may be wrong, but I don't think putting a voltmeter on the battery leads tells you anything. I seem to recall that a charger or the controller has to be connected before you can read anything. It's easiest to try this if you take the contacts out of the connector shell so you have something to clip your meter to. (using appropriate caution to not short anything out or mix connections up!) The sure-fire way is to check across the batteries themselves, but you have to take the battery cover off to get at them. The batteries don't have to be removed, though.

The controllers are serialized to the motors, but the batteries are interchangeable, so you can swap them around for testing.

I should also mention that the chargers cannot be assumed to be reliable. I have three, two of which don't charge at all, and the third is prone to partial charges.

I am available this weekend. PM me for contact info.