I have a 1992 chevy c1500 with light issues. Left turn signal works fine, right side blinks like 4 ways,along with license plate light.when head lights are on nothing for right side turn signals. Hazards everything works fine. Changed fuse,relays,turn signal switch,flasher. Help I'm lost

My guess is one of those lamps is burned out, therefore not sending current to the next. My second guess is that the license plate light is last in line, so I would start with the left tail light

try moving the wires around the socket or could be the flasher

Could be rust.

could be something in the turn signal switch

It could be a bad multifunction (turn signal) switch. The way that switch works, it is possible that it can turn on the front blinker and not the rear one. It also cancels the brake circuit so the turn signal can work with the brake pedal depressed.

However, a more likely cause would be a break in the YELLOW/BROWN wire at the rear of the truck. It is common for the connector to get corroded at the left rear frame area where the bed harness connects to the vehicle harness. If you have trailer connections spliced into the wiring harness, these connections are also prime candidates for corrosion. I would look there first. Inspect these harnesses thoroughly all the way up and into the tail light assembly.

If the wires under the back of the truck look good, then I would check for power coming out of the turn signal switch. The wire at the turn signal switch is plain YELLOW (with no brown tracer). It is Pin (M) on the turn signal switch connector. The front signal is a LIGHT BLUE wire at the turn signal switch Pin (H). If you probe these with a test lamp, they should both work the same except the yellow wire will be hot with the brake pedal depressed and the switch NOT in the left turn position. If there is no power at the switch connector, replace the switch.

Well for the license plat you might wanna check the fuse. and the brake light if one works fine then I'm sure you need a new bulb in the other side. Good luck

Sounds like wrong bulbs in some sockets

Check the ground wire over in that area, may be broken or rusty.

Hello. The symptoms you are describing are likely due to a poor ground. Temporarily install a new ground wire by securing a piece of copper wire to the frame with a self tapping screw. Use this ground wire along with the hot wire to see if each of these lights works. If it does, trace the ground wire back to the frame, unscrew it and clean up the metal with emery cloth so you reestablish a good ground.