define tail light...........brake light,,,
tail light means to me you are checking the brakes lights with the lights turned on... and when you hit the brakes you then lose the brake light on the passenger side..but the tail light is still working..or am I confused..
either way like cletis says, could be a short,, mine would drive me crazy back yrs ago, I just cleaned the contacts good, made sure the bulbs were working and finally got it all in senc..