Not mine but a friends' TD5. Some while back he had installed Carlos Fandango LED lights to match the Sawtooth Alloys and NAS full width rear step. The o/s reversing LED decided to fail so he called me asking can I fix the problem, 'Sure I say, it's only a couple of wires...'
I trundle down the lane to view the patient to find not one, not two, but three connectors between the main wiring loom and the Carlos Fandago's. Why can't people wire properly?
So cut out the offending mess...whilst being covered in shedloads of mud n crud...installed new connectors to the rear of Carlos Fandango's, new clean wires from the CF's, routed directly to the main loom to find, yep...no power. So there's an open cct or permanent short somewhere in the loom. I decided this can be completed another day when it's not 29degsC and came home