tomcat59alan
Well-Known Member
Isn't there a problem with the headlamp wipers not parking correctly causing a drain on the battery?
If you get the right battery for the model, you should be fine. I had a wealth of trouble with the wrong battery. Before it I would park her up, go away for over 12 weeks, come back and fire her up, no issues. Went through the issues. Eventually got right battery, now she sits for two weeks or more at a time, I do around 60-80 miles a month, and start her first time ( hopes not to jinx it)
The usual way to look at random L322 faults is, battery, diagnostics. Then go further if need be.
Isn't there a problem with the headlamp wipers not parking correctly causing a drain on the battery?
If there is a drain on whatever system Set a dvm up with long cables next to the fuse box for current so you can see, then systematically pull fuses - when you pull the one that is parasitic will show on the meter.
Check that they are seating properly when you switch engine off. They are known to be a drain, if they are not seated correctly.
This is how the headlight wipers are sat (photos attached). The drivers side wiper is sat ever so slightly higher? But is that improper/enough to cause a drain? View attachment 215582View attachment 215583
That wiper is not in the home position and that can cause battery drain.This is how the headlight wipers are sat (photos attached). The drivers side wiper is sat ever so slightly higher? But is that improper/enough to cause a drain? View attachment 215582View attachment 215583
Maybe the arms are one spline out of position.neither of my wipers sit flat but i don't have a battery drain
very possibleMaybe the arms are one spline out of position.
Lucky you , but as it is a known fault, the OP might as well check it.neither of my wipers sit flat but i don't have a battery drain
Lucky you , but as it is a known fault, the OP might as well check it.
So to update:
There is a 3amp parasitic drain when the ignition’s turned off. It drops down to around 2.5amps after ten minutes of shutdown. Eventually left with a 2.6amp paristic drain at 12.2volts
Regulated output from alternator at 14.1volts is 60-70amps. Rising to 88amps under load.
With the fans on it goes up to 81amps so alternator is working under volts and amps.
Acceptance amperage of 38amps.
So the battery is taking and holding a charge and it’s not the alternator. Hopefully the BMW specialist will be able to get some more targeted information on Monday. But does anyone in here have an immediate reaction to that 2.5/2.6amp drain? Hoping someone says that’s definitely the final stage resistor ’cos I think even I could fit that!