I've recently had issues regarding my parking sensors, all were ticking correctly apart from one. *Each time I put it in reverse it beeps for 5 seconds) removing the back bumper from my car I discover that that one of the 4 cables from the loom isn't outputting anything, which is why the forth sensor isn't working. As a result I have ordered a replacement cable loom for the sensors. Can anyone advise when this loom plugs into the car? I attempted to follow the cables back but had no luck.
(BMW E46 Convertible 320D)