[rusty]

The problem will be in the charger. Even with the charger unplugged from the wall outlet, the charger relay should click when plugging it into the cart.

All chargers are repairable. It's probably either the relay or the circuit board.

There is a way to jumper the relay to force it to charge but this is only an emergency and temporary fix because the charger is automatic and it will no longer be automatic if the relay is jumped. Yes, it will ruin your batteries if left on to charge this way.