I'll apologise first, as this is probably a daft question - trying to get parking sensors working and been through the threads on here (been really helpful) up shot is I seem to have a duff sensor on the rear and two duff on the front - no ticking noise and if I swap them over to one that is working - still nothing so process of deduction the wiring must be ok. My question is, if there are a couple not working does the entire system give up completely and not work at all, even though some appear to be ok? Just want to be sure before I go and order up some replacements.

Gradually 'de blinging' the car as well - chrome door handle covers gone and fog lamp surrounds as well, found the original fog lamp surrounds in the spare wheel well this am when I was fitting the towbar. Standard grill and side vents on there way as well which will have it looking much better.

If a single sensor fails, the whole system won't work. Makes sense of course but is also annoying

So you would have to replace all duff sensors before you can continue testing the rest of the system. Hopefully the new sensors are the only issue to be resolved. MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Cheers - hopefully will fix it - there was a receipt for a new control unit in the file I got with the car and its only about 8 months ago so hopefully this is an easy fix.

Are they not working at all? Or do you get a continuos tone? Bushy

2003 RR Vogue Monté Carlo Blue

yep - get a continuous tone and light flashing at the dash switch when I go into reverse.

Well with the new module already fitted, I would guess the sensors are the most likely culprit, however if you replace them and still get this continuous tone, like me , try replacing the rear parking sensor loom located in the bumper. This is a apparent very common fault that our cars suffer with. The wires corrode as they contact the sensor and over time they fail completely. Bushy

2003 RR Vogue Monté Carlo Blue

cheers for that - will give the sensors a try first and see where it takes me - had hoped to do the digi Tv upgrade but can see that having to wait another month at this rate..........

I replaced two sensors (the Faultmate told me which ones failed) and it was fine after that  MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!