Inspect Trailer for ABS flash codes

To obtain blink codes using ignition power activation, perform the following procedure: Turn the ignition switch on for no longer than 5 seconds. The ABS indicator lamp will be on. 2. Turn the ignition switch off. The ABS indicator lamp will go out. Turn the ignition switch on. The ABS indicator lamp will then come on, then go out. 4. The blink code will be displayed three times by the ABS indicator lamp on the trailer. Blink Code Problem Area Action 3 Sensor BU1 Determine sensor location. Check sensor installation. Make necessary repairs. 4 Sensor YE1 Determine sensor location.Check sensor installation. Make necessary repairs. 5 Sensor BU2 Determine sensor location. Check sensor installation. Make necessary repairs. 6 Sensor YE2 Determine sensor location. Check sensor installation. Make necessary repairs. 7 External ABS modulator valve Verify proper electrical installation. Check power supply. Make necessary corrections. 9 Internal modulator failure, inlet valve #2 Verify proper installation. If code continues, contact Meritor WABCO for assistance. 10 Internal modulator failure, inlet valve #1 Verify proper installation. If code continues, contact Meritor WABCO for assistance. 11 Internal modulator failure, outlet valve Verify proper installation. If code continues, contact Meritor WABCO for assistance. 14 Power Supply Verify proper electrical installation. Check power supply. Make necessary corrections. 15 ECU Failure Verify proper installation. If code continues, contact Meritor WABCO for assistance. 16 SAE J1708 Failure Internal failure, contact Meritor WABCO. 17 SAE J2497 (PLC) Failure Internal failure, contact Meritor WABCO. 18 Generic I/O Failure Verify proper electrical installation. Check power supply. Make necessary corrections.