Bendix Commercial Vehicle Systems MC-12 MODULATOR CONTROLLER ASSY - Manual (Page 12)

12
Troubleshooting
SECTION II
INSPECTION FOR ILLUMINATED LED's
YES YES
GO TO SECTION IV
“TESTING FOR POWER
TO THE EC-12 ™
CONTROLLER”.
NO NO
START HERE
IS GREEN, PWR, LED ILLUMINATED?
REPLACE THE EC-12 ™
CONTROLLER
ARE ANY RED
LED's
ILLUMINATED?
NO
ARE ANY RED LED's ILLUMINATED?
YES
NO
YES
GO TO SECTION IV
“TESTING FOR POWER
TO THE EC-12 ™
CONTROLLER”.
NOTE AND RECORD
THE CONDITION OF
ALL RED LEDS
GO TO SECTION III “INSPECTION
FOR ILLUMINATED LEDS ”.
RED LEDs
ANY ILLUMINATED?
CHECKING
"PWR" LED
WITH TRACTOR IGNITION ON AND BRAKES HELD
APPLIED, INSPECT EC-12 ™ CONTROLLER FOR
PRESENCE OF ILLUMINATED LEDS AND RECORD.
GO TO SECTION I “TRAILER STATUS
LAMP TESTING”.
ON?
CHECKING
"VOLT" LED
ON?
IS RED “VOLT”LED ON