[chicochapman]

Thanks to my new best friend - Tourist, the reversing sensors are now working.
As a precaution, I did a continuity check on the loom he sent me and all ok.
"Acting on information received" I was able to remove the rear bumper and fit the missing loom. I also sprayed the ECU to loom socket with switch cleaner as it had been exposed to the elements under the car.
However on hooking everything up again - no joy.
So off with the bumper again (only took 10 mins this time) to remove all the wiring ECU to sensors. Onthe way I struggled to discover how to remove the rear floor mounted tie-down point,eventually spotting the blanking plate which hid two fixing screws. This allowed the trim to be lifted to remove the wiring. Anyway, I eventually found that the root cause of the problem was corrosion inside the ECU cable to loom socket. I have a small ultrasonic cleaner so I cleaned the socket in this in hot white wine vinegar.
Job done ! yes!


PS to aid continuity testing, the black core of the white ECU connector can be prised out to identify which wire goes to which pin-hole