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29
MBS-1P Installation
Accessing Current Fault Codes
Turn all power OFF
YES
Repeat
Procedure
NO
Power the stop lamp circuit (red).
Does the malfunction lamp light
and remain ON?
Power the auxiliary circuit (blue):
• One second ON
• One second OFF
• ON until flash code is identified
The malfunction lamp will begin
flashing a code. The code is
identified by the number of times the
lamp flashes. The lamp will repeat
the flash sequence for one minute.
Malfunction lamp does not turn OFF,
at power up, after the original fault
is repaired
There are no current faults.
NOTE: Power with a light
tester or by pulling down
on the trailer brake lever.
NOTE: Current fault codes cannot be
cleared until the cause is corrected.
NOTE: Power with a light tester or
by turning the ignition ON and OFF
(newer models).
322UX018
Figure 18, Accessing Current Fault Codes
To identify the fault, the code will correspond to a specific fault found in the
Flash Code Identification Table on page 35. Before any maintenance is
performed, disconnect all power from the system.
In the unlikely event that more than one fault is present, the malfunction lamp
will not turn OFF at power up after the original fault is repaired. Repeat the
above steps to identify other faults. This allows repair personnel to focus on
one fault at a time.
If a stored fault exists, it will be identified after the last stored fault is cleared
(see Clearing Stored Faults). Current faults will always be displayed first and
cannot be cleared.
