On my '04 330i, I've been on high-alert over the years for battery drain on the blower-motor resistor. I've been through a couple of battery-drain episodes, but it was never this part - so mine is still original.
I've never had trouble with the blower - aside from a squeaking noise at low speeds. This morning, the blower wouldn't come on at all - on manual, on Auto, etc... I left it on about 2/3's speed - and headed to work. As I hit some rumble divots in the highway a few miles out of town, the blower came on and ran normally.
So my question is - does that sound more like a loose wire? Or could it be the resistor beginning to fail?? What is the normal mode of failure for the resistor? Will the blower motor itself fail like that? Or is it likely in the power control wiring?
I've never had trouble with the blower - aside from a squeaking noise at low speeds. This morning, the blower wouldn't come on at all - on manual, on Auto, etc... I left it on about 2/3's speed - and headed to work. As I hit some rumble divots in the highway a few miles out of town, the blower came on and ran normally.
So my question is - does that sound more like a loose wire? Or could it be the resistor beginning to fail?? What is the normal mode of failure for the resistor? Will the blower motor itself fail like that? Or is it likely in the power control wiring?