trailer brakes not working! what to check?

[THEE RAT]

ok since im bored at work and im gonna be hooking up to my trailer tomorrow i thought i would ask you guys what to do/ check tonight..

truck
2002 F350 6 speed

i bought the truck with a controller already in it. has not worked since i bought the truck. 2 weeks ago lol

what are some things to check or test or to look for? i have another controller at the house. i could just tap into the ol wires and check that way to eliminate the controller.

the lights and signals work fine on the trailer just no brakes.

thanks guys!

[THEE RAT]

nothing huh. sad!

[Zaairman]

Why not do the obvious and swap brake controllers?

[THEE RAT]

was just thinking of other things to check if that does not work!