Tailgate Wiring Loom Repair
I have had an issue with the high level brake light on my E61 since I bought it, I suspected that it might be the tailgate loom.
BMW wanted £500 for a new loom and £1200 if they fitted it!
I decided to repair the loom myself, it took about 3 hours
1 I removed the tailgate spoiler and rear brake light unit, this is located by 4 torx bolts from the underside of the glass tailgate, you need to unplug the antenna wire and loom an dthen slide the unit towards the rear of the car to detach it.
2 undo the loom securing bracket on the right hand hinge, you also have to remove the glass tailgate hinge nuts, take great care as these are spring loaded
3 remove the speaker from the rooflining on the rear offside, and remove the loom grommet
4 you can then ease the loom down into the rear cargo area, remove the loom sheathing and identify and repair any broken wires
I spliced in new wires, soldered them and covered them in heat shrinks then once I had repaired all the damaged wires I resheathed the loom in almalgamating tape.
I then reversed the process