Need to find out where rear blinker/brakre/hazards come in to main harness

ignition switch or its wiring faulty

problem with a wiring plug in the loom somewhere at the back of the vehicle ,quicker to rewire the rear lights from the switch back

check for a bad ground wire for the tail lights. You are looking for a black ground wire near the bottom of the left rear corner of the car, inside. you may need to take the trim panel off to find it. if you take out the left tail light you should be able to follow the harness to where the black wires come out and a terminal is screwed to the body. turn on the hazard lights and when you get near the problem the lights will brighten and dim.

This means that either your front or rear blinker light on your drivers sides is not working. Activate your hazards by pulling up on the knob on your steering column labeled by the orange "hazard" cone insignia.
Then check to see if either the front or the rear driver-side blinker is not working. This one will need to be replaced for both of them to work correctly.

Could be the wiring near the rear end of the bronco on the underside. my left rear blinker went out, so after tinkering with it for hours, I noticed the hazards and blinkers are seperate wires altogether. i'd get the blinker working and my hazards would be out. well i don't know if that helps at all, but thats what my problem was, trial and erroring my lights.

Check the fuses in the fuse panel area. Check to see that the bulbs are good. Good Luck, Jim

When one side blinds faster than the other, the side than blinks faster means a light bulb burnt or not making contact. Are u sure the hazard light are the same with the blinkers

Flashing fast inside, is telling you there's a problem (light out) outside usually. If you've remedied that, I'd say try another flasher, as in perhaps swap with hazard flasher if same & see if that doesn't cure it.

No Turn Signal Operation (blinker)The turn signal lights in your car are a basic electrical system that controls the front and rear blinker lights to alert the intended direction of the vehicle. We have listed some of the most common problems and repair troubleshooting tips below:
Troubleshooting Procedure
To start troubleshooting this problem:

• Turn the key to the on position (do not start engine)
  
• Inspect the system fuse located in the fuse panel and replace if needed. If you cannot find the location of the blinker fuse consult your owner's manual or an online repair manual
  
• When a blinker flasher fails it can cause blinker lights to say on, not blink, or not go on at all. To test the blinker system flasher, remove the flasher unit and insert a jumper wire between the two terminals. If blinker stays on in both directions without blinking, replace the flasher. If you cannot find the location of the blinker flasher consult your owners manual or an online repair manual.
• 
  

I had an aftermarket stereo system put in my Lexus ES300. When I left circuit city I had no blinkers(hazards)-same harness. The wiring harness was disconnected.Either that or a fuse.