1999 Chevy Suburban Brake/turn/hazard/CHML not working---ta

A while ago someone rubbed the right side of truck backing up and dented rear quarter and bumped light. At time L & R brake lights did not work. I had a shop look at it and they got working again for a few months. Repair was cheap. I think they just found a short or short in bulb possibly from liquid.

However, now after truck has sat un-used for a couple months I have back on road but CHMSL, turn lights, hazards and brake L&R will not light up. If I push in the hazard button and hold it down I can get the flasher to work but don't know if back lights are actually working. But if I release into "on" position the flasher will not work either. Left and Right flasher not working.

I think it may be the clock-spring in the steering column but before I go replacing a few hundred dollar part in the truck I'd like to get a second opinion.