Sigh... parking sensors again...

hogweed · 24th June 2011, 15:59

I bit the bullet today and took the rear “bumper” off. The advice here is correct – it’s not hard, though it helps to have a friend or very long arms. Putting it back on again was rather more difficult. But… my wiring seems perfect and not corroded/worn through etc.

And here’s the strange thing – everybody was telling me it goes over the exhaust and gets burnt, but mine heads off towards the O/S rear wheel, nowhere the exhaust. So I don’t; think it's that.

Just to remind anyone reading this – when I reverse, I get the beeper as a continuous tone. The sensors don’t seem to be corroded or anything, and all tick when you put your finger near them.

The reversing light comes on OK.

Any other ideas?

Thanks

2Diesels · 24th June 2011, 16:24

Quote:

Originally Posted by hogweed

And here’s the strange thing – everybody was telling me it goes over the exhaust and gets burnt, but mine heads off towards the O/S rear wheel, nowhere the exhaust. So I don’t; think it's that.

The wiring runs along the inside of the bumper & is attached (badly) to the polystyrene impact pads & where it goes to the N/S outer sensor it travels directly above the exhaust tailpipes & has been known to drop down & melt on the pipes, mine did this but the fault didn't show it's face until the salt had corroded the bare wires at the melted section

hogweed · 24th June 2011, 16:58

Quote:

Originally Posted by 2Diesels

The wiring runs along the inside of the bumper & is attached (badly) to the polystyrene impact pads & where it goes to the N/S outer sensor it travels directly above the exhaust tailpipes & has been known to drop down & melt on the pipes, mine did this but the fault didn't show it's face until the salt had corroded the bare wires at the melted section

Hhmmm… wish I’d looked at it more closely when I had it apart, as it didn’t seem you could get to the exhaust from where the wires were – they seemed way too high up etc.

Phil-T4 · 24th June 2011, 21:54

You need to check ALL the wires carefully for damage and continuity, i am rebuilding my third parking sensor loom, if water gets in anywhere the capillary action moves it up the sleeving and rots the copper inner cores, just had to cut off 18 inches of one wire until i found good copper!

24th June 2011, 15:59	#1
hogweed I really should get out more....... Vauxhall Insignia CDTi; MG TF 135 Join Date: Jan 2010 Location: Norn Iron Posts: 2,958 Thanks: 942 Thanked 378 Times in 297 Posts	Sigh... parking sensors again... I bit the bullet today and took the rear “bumper” off. The advice here is correct – it’s not hard, though it helps to have a friend or very long arms. Putting it back on again was rather more difficult. But… my wiring seems perfect and not corroded/worn through etc. And here’s the strange thing – everybody was telling me it goes over the exhaust and gets burnt, but mine heads off towards the O/S rear wheel, nowhere the exhaust. So I don’t; think it's that. Just to remind anyone reading this – when I reverse, I get the beeper as a continuous tone. The sensors don’t seem to be corroded or anything, and all tick when you put your finger near them. The reversing light comes on OK. Any other ideas? Thanks

24th June 2011, 21:54	#4
Phil-T4 I really should get out more....... MG ZT-T, Rover 75 Tourer Join Date: Mar 2011 Location: Olney Posts: 2,969 Thanks: 245 Thanked 1,088 Times in 657 Posts	You need to check ALL the wires carefully for damage and continuity, i am rebuilding my third parking sensor loom, if water gets in anywhere the capillary action moves it up the sleeving and rots the copper inner cores, just had to cut off 18 inches of one wire until i found good copper!