Does the high mount brake lamp work? The rear turn and brake lamp use the same bulb filament, just not at the same time. Did you check for voltage anywhere, use a test light. Did you try pushing in on the bulb a little, to see if makes good contact, with either the brake or turn signal on?
At the left rear, when activated, the yellow wire is voltage, check for voltage. The black wire is ground, check that also. The brown wire is for tail lamps.
The problem could be in the wiring circuit, somewhere. Let us know about voltage and ground.
Sometimes when checking the turn signal switch, You can use a jumper on the proper circuits and make them turn signals dance. That way you will know the wiring circuits are ok.
Thursday, April 2nd, 2015 AT 2:42 PM