Only Camper third brake light lights up.

Hey guys I have an issue where my camper third Brake light lights up, my regular stops lights do not turn on when I press the brakes. But the weird thing is that all three work during the day. Meaning at night when I use my lights only the third brake light seems to work properly. What can it be? I checked the fuses under the hood and all seems ok.

 

where is the camper brake light wired into? and how? any new lighting additions? trailer brake controller?

 

Well those are really god questions... I actually had the camper put on about a year ago and everything worked fine... But one thing I noticed was that when I turn my headlights on at night the stop lights stay on (like if I'm pressing down on the brakes) But when I turn the lights off they go off , not sure if it makes sense...

 

It sounds like a bad ground connection.
try to locate the common ground for the rear lights and make sure everything is tight and plugged in correctly.