Posted by Daryl in Oz [116.240.129.87] on Saturday, April 06, 2013 at 21:45:52 :
In Reply to: Two Tail Lights one brake light? posted by Sterling From TX [99.98.76.231] on Saturday, April 06, 2013 at 10:42:51 :
Sounds like a bad ground, the power gets diverted to the other light, also good advice by others. I always use a test light when sorting similar problems, particularly trailer lights. Touch the "hot" terminal and try to earth through the light housing, then try a good earth.