Postby IanH » Fri Mar 29, 2013 8:54 am
Ok.
Does the rear turn signal bulb use a dual filament bulb.?
Is the problem only when both brake and reversing lights are lit ?
If so do they both share a ground.
The next steps involve taking multimeter readings, if you don't have one please get an inexpensive one, less then $10, digital from some where like Harbor freight.