Brake lights wont work. The brake light switch has to feed the turn signal switch, Either that wire has a bad connection, or the turn signal switch is bad. Jiggle the turn signal lever and that is the only way the brake lights try to work. How do I fix this myself?

Wild guess, crossed wires, bad printed circut film connector in tail lights, bad ground connection to the same film. Otherwise, wiring problems up front. signial/ break circuts.

COULD HAVE FAULTY BRAKE LIGHT SWITCH OR BAD GROUND WIRE AT BRAKE LIGHTS AND TURN SIGNAL LIGHTS.

sounds like a bad turn signal switch . both side brake lights run through it but the third brake l;ight runs direct from the brake light switch .- play with the hazard button a few times and if the start working you need the turn signal switch

THOSE LIGHTS ARE ON 2 DIFFERENT CIRCUITS. ONE WHITE WIRE COMING OUT OF THE BRAKE LIGHT SWITCH GOES TO THE CENTER BRAKE LIGHT. THE OTHER WHITE WIRE GOES FROM THE BRAKE LIGHT SWITCH TO & THROUGH THE TURN SIGNAL SWITCH SO THE LIGHTS CAN BE USED AS BRAKE LIGHTS OR TURN LIGHTS. THE BRAKE LIGHT SWITCH IS GOOD BECAUSE THE CENTER BRAKE LIGHT IS WORKING. IT IS A BAD WIRE { WHITE } FROM THE BRAKE LIGHT SWITCH TO THE TURN SIGNAL SWITCH OR A BAD TURN SIGNAL SWITCH.

WITH A GOOD FUSE TESTER, TEST ALL THE FUSES FUSEBOX UNDER THE HOOD & INSIDE THE VEHICLE. IF THE FUSES ARE ALL GOOD WITH THE TESTER YOU MUST HAVE A BAD BRAKE LIGHT SWITCH OR A BAD TURN SIGNAL SWITCH. THE BRAKE LIGHT CIRCUIT GOES UP THROUGH THE TURN SIGNAL SWITCH & THEN TO THE BRAKE LIGHTS. FIRST OF ALL IS THE BRAKE LIGHT SWITCH GOOD ? THE ORANGE WIRE FEEDS THE BRAKE LIGHT SWITCH, THE WHITE WIRE PUTS POWER TO THE TURN SIGNAL SWITCH, SO THE LIGHTS CAN BE USED AS TURN LIGHTS OR BRAKE LIGHTS. , PUT A TESTER IN THE WHITE WIRE & PRESS ON THE BRAKE PEDAL. IF THE TEST LIGHT LIGHTS UP, BRAKE LIGHT SWITCH IS GOOD, BY THE WAY THE BRAKE LIGHT FUSE MAY BE LABELED" STOP", THE FUSE LABELED" BRAKE" IS FOR THE ABS SYSTEM. TO CHECK THE TURN SIGNAL SWITCH FOR BRAKE LIGHTS, REMOVE THE PLASTIC COVER FROM UNDER THE STEERING WHEEL, PRESS ON THE BRAKE PEDAL, PUT THE TESTER IN THE SMALL YELLOW WIRE, THEN THE SMALL GREEN WIRE. IF THERE IS NO POWER IN EITHER WIRE, THE TURN SIGNAL SWITCH IS BAD.

The entire brake light system has, at best, one fuse. In fact, the fuse that the brake light current flows through probably feeds more than just the brake lights.

If the same filament is used for brake light and turn signal, the power to the brake lights goes through the turn signal switch. When turning, the brake light power is disconnected from that light by the TS switch, and the flasher is connected to that light instead. So a bad TS Switch can fail to reconnect the brake light power to that light.

If there is a separate light or lens for the TS and the brake light, that doesn't apply.

If the third brake light works and the regular ones don't, it is most likely a bad turn signal (multifunction) switch. The switch is able to kill the brakes lights to run the turn signals, and in rare circumstances does this. I've seen it several times. It could also be wiring, especially near the turn signal switch, but it is usually the switch.

It is most likely your brake light switch. The wiring from the brake light switch goes to the turn signal switch. When the turn signal switch is centered both brake lights are connected, unless the switch is faulty. When the switch is to the left only the right light is connected to the brake light switch and vice versa. A bad switch can cause all kinds of problems with the brake lights as well as the turn signals.
To replace, locate the brake light switch at the top of the brake pedal (on the mounting bracket). Unplug the connector. Loosen the locking nut and remove the switch. Install the switch and adjust the height so the switch activates at the right position. Reconnect the connector and check for proper function.

TURN SIGNALS WILL FEED BACK THROUGH THE TURN SIGNAL SWITCH.THEY ARE INDEPENDENT OUT SIDE ON THE CAR BUT NOT IN THE SIGNAL SWITCH.REPLACE THE SIGNAL SWITCH

Brake light switch, located on upper brake pedal should be checked, that is most likely your brake light issue, but U say tail lights aren't working, but running lights do, tail lights and running lights I would consider to be the same, so can u clarify that for me? Let me know how the u do w/ brake light switch, and if u have issue w/ tail lights?