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Brake light switch failure, bad ground wire at rear of vehicle or fuze blown.
The brake lights propbably don't work because the brake light switch (found at the brake pedal) has failed. A problem with falcons all the way through. To check them, disconnect the switch wiring. get a length of wire with a 10A fuse in line with it. basically what your trying to do is bypass the switch. if the brake lights come on when you complet the circuit, the switch will be the fault.
Yes if the wire is part of the brake lamp switch
The wire you are looking for is a white wire in the bundle that is closest to the brake pedal. Use a test light or meter to check voltage going through the wire when the pedal is pressed.
It could be the ground wire, the brake light switch, a damaged wire or connector or the turn signal switch.
Are you sure its not a ground wire?
Use a test light One wire (hot) will illuminate The other wire (cold) goes to the brake lights will not illuminate
Should be HOT at one side of the brake light switch
Assuming you're talking about a brake control valve, there is no wiring...
There should be only two wire connections on the stop light switch. You need to put a constant 12v supply to one side of the switch and the light wire itself to the other side. The switch then needs to be adjusted so that the brake pedal holds the switch in to keep the lights off. When the pedal is depressed the lights will go on. If they stay on all the time, re-adjust the brake switch.
Just follow the brake pedal up until you find a switch that has a little piston coming out of it up againts the pedal arm itself. It may be a 5 wire switch not a 2 wire switch but in any case it the brake light wire that turns on the brake lights will be the wire that changes to hot (12 volt pos) when the peddal is pressed. Hope this helps.
Shorted wire to ground or failed brake switch.