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No reverse sensors: no car next to reverse camera.: Was working ok until i changed the reverse switch with a aftermarket £12. part number 8200177718. No F after the number. Bought genuine part from renault with letter g. What i found out was the so called part without a letter works differently. 3 wires. middle live feed. both other wires make contact as soon as you push the end in.NO GOOD. the proper one has still three wires .middle live. the wire from the parking makes contact after pushing the pin in a little,then the other side contact stays there until you take the gear selector out of reverse. So layman terms means the reverse sensor just need a quick supply of current to bring on the sensors, then after the the switch has been completely push in does the lights come on. If you think about it. a pulse of current same as a tv where if you hold the on button on ,the tv will not start. but quick press and tv would operate. Hope this helps anyone
 
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