Hazard lights and turn signal dont work

You can not just cut a wire and have the turn signals still work. You need to have the turn signal switch replaced.

Bad wire . most likely where the damage is.

In the diagram for rear lamp, the top wires are voltage, the bottom black wire is ground. The brown wire on either side should be tail lamps, goes hot when you turn on the headlamp switch. The other top wire on either should be for turn signal. With everything turned on, is there voltage on that wire?
Because the front works and the rear don't, possible wiring circuit problem? The voltage for turn signals comes from bcm. The bcm knows when you turn on turn signal switch, either side, then the bcm sends voltage to turn signal lamp at the rear and front.

you have obvious short in the wiring - check the bulbs first, then the wiring. it is rarity to exchange relay - if it was not physically damaged during accident.

Ground wire for the rear light. Usually close to the light on older vehicles. Can be all the way up front on newer ones. I usually cut the ground by the plug and run a new wire to any spot on the body.

Has the car been in a fender bender ? check for wiring going to the front and rear lights to see if on has rubbed into a ground wire or the body. ( even if there has been no accident.)

Wiring short, using test light test wiring. turn signal cam in steering wheel damaged.

More likely it is the hazard/turnsignal/highbeam/cruise control switch module. It costs about $275 for the module. However there is a repair kit for the likely culprit...the hazard button. Try jiggling it around a little, see if that helps. Spray a little WD-40 into it so it can jostle back into it's correct position. You could try a junkyard unit or Ebay. It's not too hard to change. The hard part is doing it without removing the steering wheel. It can be done. I've done it. But hopefully you can locate the repair kit which costs about 15 dollars. Good luck.

there is a g force sensor in the fender. there is a fuel shutoff system in place to shut off the fuel pump in case of an accident on most newer cars.
i would call gm and ask if that is the case with your car.
same thing applies if the airbags are deployed.

What may have happened is either the headlights wiring or the parking lights wiring somewhere along the wiring fused to the left turn signals wiring. Depending on if the turn signals go on when you put the parking lights on or the headlights on.

If the signals come on when you turn on the headlights than you only need to locate the light green wire that comes off the left turn signal harness.

Next follow that wire the entire way back to the firewall looking for another wire fused to that wire as you go.

If there are no signs of this you need to continue looking on the other side of the firewall all the way back to the turn signal and hazard flasher unit which is a black box that connects to a black harness located next to a grey harness behind the knee bolster.

But if the signals come on when you turn on the parking lights than you will also need to check the wiring from the rear left signal and follow that light green wire all the way back to the turn signal and hazard flasher unit.

This should fix your problem, but if not than your problem may lay within the the wiring between the turn signal/hazard switches and the turn signal and hazard flasher unit.

Also you may have a burnt circuit in the junction block. This block is where the light green from the rear left signal and front left signal meet. Don't have a description but if you cannot find it let me know and I will go out to the yard and look myself and let you know.