Troubleshooting; Initial Start-Up Procedure - BENDIX MC-12 MODULATOR CONTROLLER ASSY Manual

TYPICAL 7 PIN TRAILER
ELECTRICAL CONNECTOR
7 PIN TRAILER CONNECTOR
GROUND
CONSTANT POWER (IGNITION)
STOPLIGHT POWER
START HERE
AMBER STATUS LAMP
BLINKS ONCE, THEN GOES OUT
SYSTEM - OK
10

Troubleshooting

INITIAL START-UP PROCEDURE

WITH TRAILER CONNECTED TO
TRACTOR, TURN IGNITION ON, APPLY
TRAILER SERVICE BRAKES AND
OBSERVE STATUS LAMP MOUNTED
ON TRAILER.
DID STATUS LAMP ILLUMINATE?
YES
STATUS LAMP DOES NOT BLINK, COMES
ON AND REMAINS ILLUMINATED
NO
STATUS LAMP COMES ON, BLINKS AND
GOES OUT.
THE SYSTEM IS FUNCTIONING NORMALLY.
MAKE NOTES OF THE PARTS REPLACED OR
REPAIRED AND STEPS TAKEN .
TYPICAL
LOCATIONS
FOR AMBER
STATUS LAMP
TEST FOR POWER TO THE
TRAILER AT 7 PIN CONNECTOR
NO
NO
ARE STOP LAMPS
ILLUMINATED
YES
GO TO SECTION I "STATUS
LAMP TESTING"
YES
GO TO SECTION II
"INSPECTION FOR
ILLUMINATED LEDS ".