Weird electrical problems

eac335 · 08-21-2022, 03:26 PM

I have a 2007 e93 335i. I just recently replaced the alternator because I was having some problems with voltage output. After doing so, I now have the ABS trifecta and inoperable wipers and turn signals with a CD95 code. I'm not sure where I should begin to diagnose. I didn't think it was possible for the FRM to partially fail.

Brian86 · 08-21-2022, 04:57 PM

Check your battery terminals.

Went down a similar path with voltage fluctuation errors and CAN bus communication errors between a bunch of modules.

Popped in a regulator, then an alternator. No help.

Turned out my negative battery terminal was loose.

There is a thread documenting my shame around here somewhere.

eac335 · 08-21-2022, 05:25 PM

Turns out I must have disconnected fuse 59 (car is 06 of 07 prod. date), which is the steering column controls, and forgotten about it. I bought a new one, slapped it in, turn signals, wipers all work, and it also got rid of the ABS trifecta. Seems like it's a one off event, but otherwise hope this might help somebody, lol.

08-21-2022, 03:26 PM	#1
eac335 New Member 3 Rep 14 Posts Drives: 2010 335D E90, 2007 335I E93 Join Date: Feb 2021 Location: United States iTrader: (0)	Weird electrical problems I have a 2007 e93 335i. I just recently replaced the alternator because I was having some problems with voltage output. After doing so, I now have the ABS trifecta and inoperable wipers and turn signals with a CD95 code. I'm not sure where I should begin to diagnose. I didn't think it was possible for the FRM to partially fail.
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08-21-2022, 04:57 PM	#2
Brian86 Captain 640 Rep 769 Posts Drives: e36 M3, e91 325xi, N50 Xterra Join Date: Dec 2020 Location: Pittsburgh iTrader: (0)	Check your battery terminals. Went down a similar path with voltage fluctuation errors and CAN bus communication errors between a bunch of modules. Popped in a regulator, then an alternator. No help. Turned out my negative battery terminal was loose. There is a thread documenting my shame around here somewhere. __________________ Sometimes a bolt is just a bolt.
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08-21-2022, 05:25 PM	#3
eac335 New Member 3 Rep 14 Posts Drives: 2010 335D E90, 2007 335I E93 Join Date: Feb 2021 Location: United States iTrader: (0)	Turns out I must have disconnected fuse 59 (car is 06 of 07 prod. date), which is the steering column controls, and forgotten about it. I bought a new one, slapped it in, turn signals, wipers all work, and it also got rid of the ABS trifecta. Seems like it's a one off event, but otherwise hope this might help somebody, lol.
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