OK, I’m gradually drawing the following conclusions -
- If grounding the Slate/light green wire from the BFMs at the 24-way Yellow connector under the centre console doesn’t energise the reversing light relays in the BFMs (which suggests that the problem therefore is not in the TRS) and there is continuity between pin 8 of that connector on the Slate/light green wire all the way back to pin 2 of the 15-way black connectors at the BFMs - and
- You have battery voltage from fuses A7 (LH) and B7 (RH) in the fuse boxes to the rear BFMs (as proven by the stop and turn lights working) - and
- You have ignition-switched voltage via fuses #1 and #2 in the centre fuse box to pin 2 of the 6-way black connector at the LH BFM and to pin 2 of the 4-way black connector at the RH BFM - and
- All the Turn/Tail and Stop lights are working correctly - then
If the reverseing lights and the rear fog lights are still not working there must be a double fault in both rear BFMs in that their respective relays within the BFMs have both failed.