Brake lights turn signal trailer lights
Brakes don't work or turn signal but park lights do work.
Checked fuses in cab and under hood found none to be
broke or burnt. The cab brake light does work. Front turn
signals do work as well.
I have two blue capped connecters at rear of truck under
bed about five inches or less from top and one long black
capped one in center of frame.
Which one is my trailer light connection?