Electrical gremlins??

[Erik Beckett]

I just recently purchased a 68 Camaro from a fellow member here. Its a great car but I am trying to sort a few electrical gremlins on the car. The previous owner just recently installed a GM headlight switch, due to the other one being faulty. I took ownership of the car last weekend and am having a weird humming noise coming from the battery when both cables are connected. As soon as you disconnect the cables the humming goes away. Also, the electric Autometer speedometer shows the mileage even though the car is off and the key is out. As soon as you disconnect the battery the mileage is no longer lit up. He says everything is hooked up to the keyed ignition not the battery.

I am probably the worst when it comes to electrical but its something I guess I have to learn. Any ideas what could be drawing the power from the battery when the key is of and out? He says he never had this issue but who knows, its not his problem anymore. The only thing he did was install a new headlight switch.



Any ideas?

Thanks, Erik