BENDIX EC-15 ANTILOCK CONTROLLER ASSY Manual page 20

START HERE FROM
SECTION VI A
20
TROUBLESHOOTING
SECTION VI B - TESTING THE MODULATOR
GO TO MODULATOR, INSPECT WIRING CONNECTOR.
DISCONNECT CONNECTOR AND TEST RESISTANCE
BETWEEN PINS ON MODULATOR, RESISTANCE VALUES
® ™
FOR BENDIX M-21 MODULATOR (FIGURE 5).
HOLD TO SOURCE:
EXHAUST TO SOURCE:
EXHAUST TO HOLD:
TEST EACH PIN TO VEHICLE GROUND AND NOTE NO
CONTINUITY.
RESISTANCE READINGS
CORRECT?
RECONNECT CONNECTOR TO MODULATOR.
TURN IGNITION ON AND PASS MAGNET OVER
RESET ON EC-15 ™
REACTION OF RED LEDS.
ARE ANY RED LED'S
ILLUMINATED?
SAME RED LED'S
ILLUMINATED?
GO TO SECTION IV "INSPECTION FOR
ILLUMINATED LEDS" AND RETEST.
READ 3.5 TO 5 OHMS
READ 3.5 TO 5 OHMS
READ 7 TO 10 OHMS
NO
YES
CONTROLLER. NOTE
NO
YES
YES
NO
REPLACE THE MODULATOR
REPEAT THE "INITIAL
START-UP PROCEDURE"
REPAIR OR REPLACE
MODULATOR WIRE HARNESS.