How do i locate an earth problem to rear lights?

Thanks, all bulbs ok. Turns out it was the connector to the rear light assembly, closed up connector, cleaned contacts. That was after changing all the bulbs and feeding a new earth to both rear lights

kev
September 2013

first thing to do is to make sure that the correct bulb type is fitted to each bulb holder[ie single/double contact/single double filament and correct wattage]then you need to clean connections to bulb holder board edge connectors,also could be poor connection where bulb holder/s, are riveted to board.

k
September 2013

This also happens when i brake, the vehicle is a citroen dispatch

kev
September 2013