Hi, I have a strange problem with parking sensors on my 56 plate Multijet 120. When putting the car in reverse they power up and work as expected, however if I have sidelights/headlights on then there is no power to the parking sensor (reversing lights are working though). Am I missing something obvious?

My first look would be a poor earth on the light unit on the side you've connected the sensor box wire to.

Mike

Thanks Mike, will take a look over the weekend. Just thrown me a bit with all lights working fine though!