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CURTMFG.COM
With Trailer Connected
Condition
Display
Probable Cause
Probable Solution
Display shows 'Not
Connected' when power
is applied to controller.
No trailer brakes when
brake pedal or manual
control is used
No connection between
brake controller and trailer
brakes – blue wire circuit
Confirm connection
to trailer connector
Confirm connector
terminal positions
Check trailer
No trailer brakes,
pedal or manual
Output power
not flashing
Mis-wired trailer
connector
Confirm trailer connector
terminal positions
No trailer brakes,
pedal or manual
Short or overload
in trailer brakes
Troubleshoot trailer
brake circuit per brake
manufacturer's instructions
Weak or no trailer brakes
or trailer lights illuminate
with brakes
Output power
not flashing
Mis-wired trailer
Check and correct
trailer wiring
Trailer brakes
on all the time
Mis-wired trailer
connector
Check and correct
connector wire positions
Display shows 'Error'
after releasing brake
Internal error
Replace brake controller
No trailer brakes,
pedal or manual
Loss of trailer connection,
unplugged or bad wiring
Stop and check
trailer connector
