Originally Posted by helgansven
I found recently that my battery would not stay charged over night. One evening while in the garage I heard the old, squeaky heater fan running even when the key was not in the ignition!
I figured this was the cause of the draw so I replaced the heater fan and all was well for a week, then it started again. The battery will loose charge overnight.
When I hook up booster cable to the battery, the heater fan will start running and the lights on the heater head unit will come on, even when the key is not in the ignition.
I think the spirit of Christine has possessed my car!!
Can anyone give me an idea of where I should be looking now to find the source of the draw?
You could pull fuses for the HVAC system.
But I assume you have the automatic control AC. The blower control modules sometimes go bad and work part time, change blower speeds oddly and at random, and sometimes keep the blower runnin even when the key is off.
Blower control modules are available in aftermarket at Advanced Auto, e.g. Here'* the location. One or two bolts hold the relay center above it and it can be raised up a little giving room.