Battery drain / Nav unit always on

[hamza]

Originally Posted by wpoll

Looks like Fuse 73 feeds power to the K3 unloader relay. This relay provides power to the Nav monitor, the GPS Rx, the telephone interface and possibly the antenna diversity module.

So... a lot of stuff....

Checked just now and the nav display works fine with fuse 73 pulled. I potentially don’t care about anything else in that list so I may accept my “fix” is just leave fuse 73 out….

[wpoll]

Originally Posted by hamza

Checked just now and the nav display works fine with fuse 73 pulled. I potentially don’t care about anything else in that list so I may accept my “fix” is just leave fuse 73 out….

There's number of wiring variations depending on year and engine - I had trouble locating the exact variation for your car (in the short time I spent looking).

The wiring diagrams are here: -

https://bmwteka.com/wds/en/e53