E34 electrical problems
I have a 1994 530i and as of the last few weeks I have had strange electrical problems occurring...
First problem that started happening is the door locks lock and unlock randomly. It happens while driving and even while the car is parked and turned off. It is rather troublesome since when I lock my car, I have to go back a little while later to make sure that it hasn't opened back up.
The second problem I have going on now started yesterday and is quite the pain in the butt. While at work I saw my cars high beams and the amber signal lights flashing erratically like some kind of alarm was set off. My aftermarket alarm was not triggered. I found out that I could stop the flashing by opening the trunk but as soon as I close the trunklid the flashing resumed. I have already tried pulling the battery to stop this problem but it did not work.
One thing to be noted is that i do have a weather seal problem. Whenever it rains I get some rain water in the driver side footwell. I do air out the car and vacuum out as much of the water as i can but I don't always get to it immediately. Is it possible that there may be some kind of short that happened under the carpet from the water there?
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Water in the driver side footwell may have to do with a clogged drain. I am not sure if it is from the sunroof, but there is a drain that when it gets clogged with debris it leaks into the drivers footwell. I have read about this issue in several forums.
The door locking and lights flashing may be associated. Check the battery. Mine was doing some wonky things as you descibed. I replaced the batteries in my remotes and the battery in the car. I haven't had any issue since. I did notice that my passenger front door lock would stay up when the other locks engaged. Immediately the rest of the locks would reset. When I was replacing my door handle gaskets (thanks Shogun) I shot a dose of teflon spray liberally around the lock mechanism. I couldn't guess to say which repair did the trick.
where is the foot well exactly can you get at the drain?
SEarch for "e34 sunroof drain clog"
The lights and hazards flashing erratically is the crash control module malfunctioning. It may also explain the door locks.
Open the fusebox in the engine compartment and look for this:
N17- Crash Control Module
It looks like a tall brown relay. You need to replace it.
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