On my brothers 77, when he got it the brake lights worked. The hazards worked, turn signals wouldnt flash, front or back. so, I pulled the hazard flasher out and put it in the turn signal spot, the turn signals worked all thr way around. Then, tonight my brother said his turn signals werent working on the rear. I looked under the truck and there was a wire coming from the engine bay wire nutted into the left and right brake light wires. I butt connected the original wires back on and the turn signals work, but the brake lights dont. Does the hazard flasher have to be in for the brake.lights to work? Fuse is.good, plug at the base of the steering column is good.