i have a 2000 Bravada, AWD, 4.3l. heres my issue...i went to hook up a boat trailer yesterday and only the left taillight worked. then i pushed the brake down and nothing worked. i now cant get any lights to work on my trailer. i checked the fuses marked with a 'trl'. is there another mystery fuse i should check? should i cut the wiring and re-wire? i followed the wires underneath the bumper and there is just a sleeve they go into that runs along the frame. where do they connect in? i REALLY wanna go fishing tomorrow so i need help ASAP. thanks.