Hi granadaman,thanks for the reply, have checked power and earth at the lamp itself and at the connector about a foot from lamp all good, and the same as the other side, which works fine. All I could think of was if the back lights are run by a module, could it be a fault with that, but have no idea if it has one, have checked on YouTube but no mention of one,by the way its 2008 rx400h. Thanks again Steve.