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[RichardH]

Hi,

I have the day off work so thought I would have a look at my parking sensors which seem to have given up the ghost.  It is the factory fitted sensor system.  Worked fine up until recently but now it never seems to work. (it works maybe once in 50 reverses)  Would someone in the know mind taking a look at these pics and see if there is anything obvious wrong and maybe give me an idea of what steps to take to fix it?

This is the parking system control box.





Two wires seem to run off up inside the rear wing up towards the front of the car (the ones in the red circle, power maybe?) but the rest of the wires run from the control unit through to this point at the near side rear light cluster but don't seem to be connected to anything.  Should they be?



I am thinking that it may be a loose connection where the parking systems taps off of the reverse light but I can't find where this connection is.

Thanks all for your help.

Regards,
Richard

[Weds]

Hi,

but the rest of the wires run from the control unit through to this point at the near side rear light cluster but don't seem to be connected to anything.  

Thanks all for your help.

Regards,
Richard

I'm pretty sure I have the same 2 loose connections in the nearside lamp cluster on my Estate, always wondered what they were, and my reversing alarm works perfectly with them disconnected..

[RichardH]

Thanks for that.  I could not see anywhere obvious for them to connect so I assumed they were fine as they were.  But it leaves me puzzled as to how the whole setup is wired to be honest!

[NickA]

I fitted one of these to my Omega that I stripped out of a written off Elite. There is actually only one connection into the main loom, and that's into the reverse light circuit. The whole thing is powered from that. The connector was under the rear plastic trim that goes across the back of the boot.

I seem to remember a couple of spare wires when I installed mine, I think they may be for trailer electrics.

[Kevin Wood]

Yep. the spare connectors are probably for the towbar loom to disable the system if the trailer is hitched up.

Kevin

[RichardH]

Thanks guys,  I will have another look at this at the weekend.

[Kevin Wood]

Looking at the diagrams there should be two wires - violet (pin 14) and violet and white (pin 9) which go to the towing hitch fog light circuit, two grey wires (pin 12 and 26) which are connected together if the towing hitch is not present and two red wires (Pin 24 and 25) which go to a "coding resistor" which resumably configures or adjusts the park pilot in some way.

12v supply from the reversing light circuit comes in on another red wire (pin 18), yellow (pin 1) and brown / yellow (pin 2) go to the speaker and green / brown (pin 23) and green (pin 13) is a volume control - shown just connected together.

Not sure those colours correcpond to your picture but hopefully that's enough information to have a prod around and fild the problem. Negative connection is on pin 10, BTW.

Kevin

[RichardH]

I have had another look this afternoon and think I have narrowed it down to a faulty control unit.

I first checked with a voltmeter that the feed from the reverse light was active, and it was so that ruled that out.

All wiring into the box was correct and I also verified that the speaker was working correctly.

From the TIS I did attempted a few diagnostic tests which were not very clear but seem to lead to a conlusion that the control unit is the problem.  So now the search is on to find one.  I have no idea what price they are new but hopefully I can find one on ebay.  Or if anybody here has one going I will take it off of your hands!

[taifunk]

I also get a constant beep when reversing. I think that the problem is in a sensor that is a bit pushed inside the rear bumper. I tried to pull the sensor out but was unable to do that without scraping the paint.
Any advice how to get the sensor out?