Check the bulb, it is double filamented with the smaller being for the stop and turn Check the socket for power and ground and/or corrosion
If only the right rear brake/signal light is effected it is not the fuse. Inspect the right rear brake/signal bulb, socket and wiring.
More than likely you have a burnt out bulb at the front signal light, rear signal light, or brake light on the right side.
In many cases, the brake light and the turn signal use the same bulb.
Turn Signal Light Doesn't Work, but the Brake Light DoesMost vehicles use a single lamp [bulb] for the tail light, brake light, and turn signal functions.That lamp usually has two filaments: one serves both the tail light and brake light functions while the second filament serves the turn signal function.You description of the issue sounds like the turn signal filament is burned out, while the other filament is not.Another, but less probable cause could be that the conductor [wire] supplying electrical power to the right turn signal filament has either been cut, or corrosion has built up within one of the wiring harness connectors somewhere in that circuit. Corrosion acts to cut off the flow of electricity.
short circuits in the turn signal and brake light circuits
i have conected the black and red wire to the brake and it works (the brake light that is) and i conected the blue and white to the signal lights each wire being left and right signal and it all works. but when i brake all of the light lights up the red bar for the brake and the orage bars left and right when i signal left or right whiles braking the signal works but the other signal light sticks on with the brake light. so if any one as any idears please let me know thanks
wiring.
the turn signal switch sends current to the turn signal flasher. it then goes to the bulb. The turn signal switch will turn on the turn signal and when the brake is applied it cancels out the brake light as it is a duel element bulb. 1 element is for brake and turn and the other is for parking lights. you can not have a blinker and a constant feed to the same element of the bulb at the same time.
the bulb with two elements in it is the turn signal and brake light bulb
Have you checked the fuses or bulbs?
Question: Does the turn signal blink on the right rear? I suspect not. Both the brake light and the turn signal use the same filament. If one is burnt out, the other will not work either. If so, the bulb needs replacing.
1976 Chevrolet El Camino turn signal / brake light bulb lamp replacement: Purchase the correct replacement turn signal / brake light bulb(s) first, before disassembling the vehicle. See sources and related links below for replacement turn signal / brake light bulb information. Then consult your owner's manual for the replacement procedure. As simple as it sounds, the owner's manual is the best place to start for turn signal / brake light bulb lamp replacement instructions and illustrations. You may want to consider replacing both left and right at the same time in order to keep brightness and color equal (optional).