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I decided to install a reversing aid. I purchased some ready painted sensors with the correct colour which really helps and providing you drill and miss the large metal bar behind the back bumper its easy. A big rubber bung lets you bring wires in to the rear compartment. The problem was removing the rear light assembly to get to the reversing light wire.
You remove the white (in my case) piece of curved trim which the top part of the seat belt passes through. Its held on by 4 clips and with gentle pulling just pops off. (Protect the horizontal trim surface as you remove it - I scratched mine very slightly) This provides access to the top wing nut of the rear light cluster. The bottom wing nut is located in the compartment with a fold down flap in the boot wall. BE CAREFUL NOT TO LETTHE WING NUTDROP DOWN AS YOU REMOVE IT. You then have to pull the lamp cluster away from the car. There are two determined plastic clips which try and stop you!

The plug just unclips and you can then change bulbs as well as identify reversing light wires. It all clips back together in reverse order.

I also fitted two front sensors and getting wires from front to rear without drilling holes proved really tricky. There is a hole and plastic bung under the front wheel arch which is easy to get to once the plastic inner wing above theroadwheelis removed. This saves drilling any holes in your expensive new car!With the wires in the passenger compartment I just ran them under the carpet. The front sensors are energised by the rear brake light which is less than successful. A switch will go in next weekend to control them instead.

Kit with coloured sensors, 4 rear and 2 front was £80 and it looks like a professional factory fitting.
 

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I have got a ford focus c max 2005. It's unbelievable I cannot locate the correct wire i.e. the reversing wire . I've used a wire tester on the loom connected to the cluster but none of the wires light up. I have engaged reverse and the bulbs light up. I've taken the cluster off without problems on both sides. There is no indication of which is the wire. I checked the tester on my battery and it works fine. I am particularly peed off because I used to fit this sort of stuff to cars years ago. What's going on!!
 

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I have got a ford focus c max 2005. It's unbelievable I cannot locate the correct wire i.e. the reversing wire . I've used a wire tester on the loom connected to the cluster but none of the wires light up. I have engaged reverse and the bulbs light up. I've taken the cluster off without problems on both sides. There is no indication of which is the wire. I checked the tester on my battery and it works fine. I am particularly peed off because I used to fit this sort of stuff to cars years ago. What's going on!!
this ought to help

View attachment Reverse Lights Wiring diagrams.pdf



 

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Hi Richard,
Thanks for this wiring diagram unfortunately it doesn't help with my problem. The answer seems not to be in the detail.
Cheers though.
Nigel
 

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Hi Richard,
Thanks for this wiring diagram unfortunately it doesn't help with my problem. The answer seems not to be in the detail.
Cheers though.
Nigel
surely ought to be Green / Black for the LH lamp & Green / Orange for the RH with Black in both cases to Earth



 

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Hi Richard.
It probably is those wires . However the problem is very odd, I have tried every single wire that goes into the light cluster, I have had the light cluster off the vehicle and tested the terminals on the plug which is attached to the cluster. My tested is working ok and the earth i use is from a live car battery. How can the lights in the cluster light up if I cannot find voltage in the live wires. where do I connect my rear sensors to if I cannot find power from the lights. Just to clarify I used to fit all sorts of electrical items to cars for a living. So I am totally foxed by this.
 

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Hi Richard.
It probably is those wires . However the problem is very odd, I have tried every single wire that goes into the light cluster, I have had the light cluster off the vehicle and tested the terminals on the plug which is attached to the cluster. My tested is working ok and the earth i use is from a live car battery. How can the lights in the cluster light up if I cannot find voltage in the live wires. where do I connect my rear sensors to if I cannot find power from the lights. Just to clarify I used to fit all sorts of electrical items to cars for a living. So I am totally foxed by this.
Try these

View attachment Gearbox Feed.pdf

View attachment Rear Parking Aid Circuits.pdf



 

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