lights flash when i press break on corsa!?

i have just installed a pair of lexus lights on my corsa ls1.2, now whenever i press the break pedal the sidelights flash, someone told me that it i have a bad earth, does anyone know what the problem is or how to fix?
thanks
liam, May 2006


done
Liam, make sure you haven't put a single filament bulb in a double filament holder if you have, the brake light circuit might be " feeding" the side light circuit!

Richard Catmull, May 2006
take a look at the bulbs make sure the u have the right one in the brake light it should be a brake and side light bulb with 2 filaments if i has only one filament in it then it wrong bulb

bob, May 2006
link Click here to see other fixes for Lexus Corsa.