I have a 1986 GMC K1500 with a 305 engine. I've been trying to track down an issue with my brake lights. I got pulled over for no brake lights the other day. I tore the tail light assembly apart and replaced the bulb. My running lights worked but my brake light on the driver side did not work. Replacing the bulb had no affect. I then checked the ground behind the assembly it was rusted and corroded so I cleaned that up and reinstalled it. Everything worked flawlessly at that point so I drove into town and picked up some stuff and on my way home my wife was following me and said that when I was blinking my lights indicated hazards even though the hazard switch was not pulled. She said that when I would press the brakes while blinking the blinkers would work properly (without hazards) only to return to indicating hazards once I released the brake pedal. Also neither my brake lights or running lights are working now. We checked all the fuses and all were working according to our test light. About two weeks before all this started we did tear up the steering column to replace a part for the ignition. That required removing the hazard switch. Also my gauge light has always been very dim. This might be unrelated but I know that ties into the light switch behind the light plunger. Sorry if that's too much information. What do you think could cause the lights to indicate hazards instead of blinking? Also no brake lights?