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Discussion Starter · #1 ·
Hi all, i have just changed my battery as the old one was getting a bit tired but still worked. Since changing the battery, i have no internal lights and the headlights come on as soon as the engine starts even with the switch on the off position! Do i have to go to a BMW dealer for them to register the battery in the car, or is this something i could change in the OBD 2 port?. Would it be possible for me to change the battery back to the old one and everything to work OK or is it too late?.
Your help would be greatly appreciated..
 

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Sounds strange.
A new battery should be coded to the car so the car knows it has a new battery and it charges correctly.
The thing with the lights is a new one to me.
 

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Discussion Starter · #3 ·
This battery was one off the net from a well known battery specialist and not bought through a BMW outlet. I didn't expect problems from just changing a battery. I should have read deeper into it..
I fitted my old battery this morning and the faults are still there..:(..
 

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Very strange.
Try disconnecting the battery for 30 minutes to let everything reset then fit it back on.
Not sure but i always fit the positive first then the neutral cable.
It should be coded to the car so it charges correctly but cant understand the problem with the lights.
 

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The only time I have known a fault like that (on a 2013 x3) was with a dodgy connection on the jbbfe. Just wondering if you have disturbed one of the power supplies on the battery terminal box? Might be worth checking everything is plugged in properly and secure on that terminal box that sits on top of the battery
 

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Discussion Starter · #8 ·
I had diagnostics done by German Autocentre in Sheffield and it came back as the Footwell Module. After looking up this module i came across a list of faults that go with it. The auto sparks suggested it was a power surge when connecting the battery that could of caused it.

"A very common problem with BMW’s FRM3 footwell module (usually fitted to E81, E82, E84, E87, E90, E91, E92, E93 vehicles manufactured after 09/2009).
Symptoms of failure are: (all of these symptoms need to be present for this repair to be relevant).
  • Main beam always on with ignition & cannot be switched off.
  • No interior lights
  • No indicators
  • Bulb check error on dash.
  • Electric windows, sunroof, mirrors, central locking not working.
  • FRM module not responding with diagnostic tool.
This failure usually occurs if the vehicle has had battery issues, been jump started, disconnection of the battery, issues after running diagnostic / programming procedures. In 99% of cases the FRM3 footwell module can be brought back to life without need of replacement module".

I have not got a price yet for replacement and fitting (the diagnostics cost £72), but will post it when eventually i stop crying!.:cry:..
 
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