have a IC BE school bus with no brake light .brake light relay and fuse are good checked wire from dorman light monitor to rear brake light work fine there have no power to monitor on brake input wire .... any ideas thanks
1.1.1. Displaying Codes on the Gauge Cluster (Non-VID equipped vehicles)
To display codes on vehicles not equipped with a VID:
1. Set the parking brake.
2. Turn the key switch to the IGNITION position to view both active and previously active codes.
3. Momentarily press the Cruise "ON" switch and the Cruise "Resume" switch at the same time.
A gauge sweep will be performed on the gauges. The gauge cluster will then display the following information for 5 seconds:
Software Rev: XXX Hardware Rev: XXX Active Faults: XXX Total Faults: XXX NOTE: The gauge cluster will only display "Software Rev" and "Hardware Rev" for 5 seconds followed by the message "Diagnostic Trouble Codes are not available" if the vehicle is not equipped with the option to display codes.
If faults are present, the gauge cluster display will show each diagnostic trouble code for 10 seconds and then automatically scroll to the next entry and continue to cycle through the faults. Once all faults have been displayed the number of faults will be displayed again, then the cycle will repeat. To manually cycle through the fault list press and release the cluster display selector button. The following information will be displayed for each fault:
SPN: XXXX FMI: XX Active OC: XXX SA: XXX
SPN: XXXX FMI: XX Previously Active OC: XXX SA: XXX
NOTE: Turning the key switch off, turning the key switch to the CRANK position, or releasing the park brake will take the gauge cluster out of the diagnostic mode.