ok I just found out that my brake lights are not working. I am thinking brake light switch? Turn signals and running lights work. any help would be great. ohh yeah I have a 2001 ctd 4x4
The best way I have found id to start at the begining of the circuit.
step 1: check fuse
if fuse is ok go to step 2 if bad replace fuse ( if fuse is bad check for wire shorts)
step 2: on the break light switch (using a test light) there should be a constant hot on 1 of the wires at all times. if not check wire to fuse block if yes go to step 3.
step 3: with brake pedal applied the other wire off the switch should become hot. if not replace switch if yes go to step 4.
step 4: with brake pedal applied check plugins to the brake lights with test light. if no check grounds and harness back to the cab if yes replace bulb.
Hope this helps you. good luck.
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