fitted a new bumper and had to drill mew holes etc, wacked it all back together and all fine, for a day or so. Take the bumper off for access, find no fault or wiring problem, plugs all fully home. Put it back on, all working, for a day. And so it goes on.
Some thoughts that may or may not be relevant.
I had this abot a year ago when fitting lpg filler and switch cleaner sorted it, but it made the rubber weather seals in the plug swell up, so the plug would not go on, so i used silicon spray on the rubbers and the plug then clipped home. Would silicon spray in the plug pins cause a short?
Would the bumper fitting closer to the cross member have any effect? how do the sensors work? any magnets involved to cause them to play up? doubt it but need to know what im playing with.
Put the car in reverse, engine off so i can here the beeps while at the back of the car, touch the sensors with the right amount of pressure and they tick or pulse, is this normal, does touching them do any harm?
any thoughts appreciated, i hate electrics and the fact the whole system fails in a constant lower tone doesn't help pinpoint which sensor, or wiring to, is playing up.
Ta.