Im not sure what you mean by RELAY brake light switch. There is 1 brake light switch on the brake pedal. Check it with an OHM meter,wires disconnected brake off should be "open" (no connection) press the pedal and should have no resistance (0 OHMS)
You may want to start with the brake fuse. If you still have turn signals and lights. you may also want to check the brake electical relay switch in the relay box Check as well the brake switch located at the brake pedal.
The brake relay switch can be found on the firewall in the engine compartment. The brake relay switch will be on the drivers side of the firewall.
Turn Signal / Brake Light Troubleshooting (check in this order): 1. Check Fuse 2. Check Bulbs 3. Check Flasher Relay 4. Check Turn Signal Switch in steering column and/or Brake switch down by brake pedal. Most likely its the fuse or bulb. See sources and related links below for bulb information.
The 1991 Volvo brake light relay switch is located beneath the drivers side dashboard. The brake light relay switch will be above the brake pedal.
The brake light is controlled by a relay switch. If the relay switch is bad the brake lights will stay on. The brake light switch simply plugs in and out. Unplug the brake light switch until you can replace it.
The 1998 Chevrolet Cavalier brake relay switch can be found below the dashboard, on the drivers side of the passenger compartment. The brake switch simply plugs in and out.
The 1996 GMC Yukon brake lights work by receiving power from the brake light relay switch. The brake light relay switch is connected to the brake pedal.
The brake light switch relay for your 1997 Chevy truck is located beneath the drivers side dashboard. The brake light relay switch will be above the brake pedal.
The brake relay switch is bad.
It should have only a fuse and a switch, no relay. Check ALL of the fuses with a test light.
There is no brake light relay. There is however a brake light switch located above the brake pedal.
There are several relay switch is on your 1996 GMC Jimmy. The brake light relay switch can be found below the dashboard in the engine compartment.