Does anyone have a wiring diagram? I feel like I’m missing something here. I need to determine the causation between the removal of the climate control and the now high resistance on the main power wire.

Very frustrating.


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WDS...
https://bmwteka.com/wds/ru/e53

Also handy - for Android: -

https://play.google.com/store/apps/d...wdsviewer.free

WDS shows that the output stage (speed control in HVAC panel - the IHKA ) is between Fuse 64 and the blower motor....

Thank you! Last time I was looking for the WDS I couldn’t find it, this is a big help in removing unknown variables


So here’s the FSR connector:

https://uploads.tapatalk-cdn.com/202...fd6213b9a3.jpg


I’ve tested all 5 pins of the connector. On pin2 I probe 700ohms between X8722 and X10454. While I’m probing I have the 50A fuse removed and have the probe inserted into the spade terminal. I have the X8722 connector disconnect and probing into the female side.

If the wiring diagram is correct then I can only conclude there is a an issue with the wire.

Anyway I’m going to do more testing tomorrow

Thanks again


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Solved the issue by running my own wire from X10454 to X18722. It’s still unknown how the factory wire failed and why it failed when it did but alas I can warm up my frozen toes now. If it wasn’t freezing I would’ve pulled apart the interior. Instead, I decided to cut out the old and solder in a new wire.

https://uploads.tapatalk-cdn.com/202...9941c0eb50.jpg

Thanks everyone for the help!

Cheers, E53Envyy


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good find!

Are you really sure that you are not probing connector X671 and that X18722 isn't the problem?

I’m sure. X18722 is a 2 pin connector located inside the dash almost directly behind the climate control. The connector had no visible damage and I cut and solder my wire in before the connector so the connector can still be used to disconnect power going to the FSR. Basically I’ve replaced the wire going between X10454 and X18722.


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I doubt the problem is in the wire itself. I would make really sure the crimps and connections on the ends of the wire are good before looking at the wire itself.