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did you scan the PCM first.
rear lights dead, not dead dash brake warning light.
check all fuses first?
the fuse is in the cab or under hood
so lets find out where, i open FSM book, and look at schematic
the fuse is in JB box. cab fuse box.
its marked clearly as. Fuse F23 Brakes.
the brake switch is on the brake pedal.
if the fuse is good, 12vdc on both sides.at all times.
then the brake switch is open
if its output is 0v brakes pressed.
if the output is 12v then the switch is good, and the wire
are bad, to the rear.
or both lamps burned out or both sockets bad or wires cut
from trailer hitch hacks,.
The fuse block that contains the brake light relay is under the left side of the rear seat.There is also
a fuse block under the right side of the rear seat. Another behind the dash under the steering column. And one more under the hood right front corner of the engine compartment. If the relay is
good, check the brake light switch for constant 12v in and 12v out when peddle is pushed.
The brake light switch is under the dash at the top of the brake peddle. Hope this helps.
Most likely the fuse, if the fuse is good, then check the brake light switch, that is under the dash, near the top of the brake pedal.
Press on the brake pedal with your hand and see if the button is popping out, if not, tap on it and see if it pops out, if not, replace it.
IF you have NO brake light in the rear and NO HIGH mount stop light. You may have a BAD Brake light switch this located at the top of the brake pedal under the dash. Replace switch and that should solve your problem. Good luck and thanks for using FIX YA