AU Falcon Car Battery Drain when not driven - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

Monster Inc · 02-22-2009, 21:45

Hi,
I have an AU series 1 with a phantom electrical drain on the car battery that flattens it when it not driven for a couple of days. Battery is otherwise in good order.

Is there a common fault in the AU series that I should look at first? Someone told me that the BCM is the likely culprit. Any thoughts?

pgba · 03-05-2009, 19:39

Hi There
Don't know if this is of any help I had a similar problem with my ED recently. It turned out to be the alternator. What happened was that oil was slowly leaking from the bottom seal at the front of the crank case an dripping or spraying into the alternator wiring which slowly gummed up the alternator so that it would not charge. I needed to have the alternator replaced in the end along with a new seal.
Cheers
Paul

thefonz · 03-06-2009, 03:39

Testing the alt. would be the first step.

AU2XR85.0 · 03-31-2009, 00:53

Not sure if this is your problem, but i had a dicky boot switch, and subsequently the boot light was on, running the battery down.

Good luck finding the fault, maybe put a multimeter in series with the pos terminal and see how much is being drawn when everything is off.

gl351xd · 04-06-2009, 18:38

First things to check is the boot light and glovebox light .