BENDIX MC-12 MODULATOR CONTROLLER ASSY Manual page 12

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