Changed trailer brake box on 2003 Ford F-250 Super Duty now the brake lights and cruise control quit working.
SOURCE: 2003 Denali Yukon, no Brake lights, no Cruise Control, fuse is OK
Check your brake light switch at the pedal. This controls the lights and disengages the cruise when stopping. I'd look there before I go anywhere else. There may just be a wire loose. Could be a simple fix.
Good Luck and hope this helps.
SOURCE: 2003 mach1 mustang, no brake lights, no cruise control
Check the fuses, if they are blown, make sure they are the right size. If not, do not use bigger fuses than the circuit is supposed to have. If they are too small, use the correct size. If they are, do you have any extra equipment using the same circuit? Like a stereo or GPS or an alarm system? Move them to a different circuit. Check the relays to see if they are defective. Check all the bulbs to make sure they are the right ones too. Make sure they are in the right way. Check grounding wires, make sure they have good connections.
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