International Anti Lock Light stays on

Wish I could be more help mine has been on for about a month (12 pro star) figure I'll get looked at during downtime.

 

Start with your abs sensor

 

first u need the code from the abs computer then diagnosic from there but 9/10 its a wheel speed sensor

 

Look at all your brakes. I had a pad that went bad and was sticking past a drum about an inch causing the light.

 

8.3. DIAGNOSTIC LEDS
There are nine LEDs, plus a magnetically actuated reset switch in the EC–15 diagnostic window ( Figure
15 ). The first five LEDs locate a problem to a specific area of the vehicle, while the last four indicate the
problem component or its wiring. The LEDs are software driven and are either ON or OFF depending upon
their monitor function.

 

FRONT’ LED
This Red LED turns ON and stays ON to indicate the location of a problem component or its wiring. This LED
(when ON) indicates a defect in either the right or left front modulator or sensor circuits. The defect may be
either the wiring or components. The FRONT LED lights at the same timeas either the RIGHT or LEFT
LEDand either the MOD or SENS LED.
’MID’ LED
This Red LED is not used in troubleshooting the ECU and should only turn on when a magnet is held
on the RESET switch.
’REAR’ LED
S04023
ANTILOCK AIR BRAKE SYSTEM: BENDIX 29
This Red LED turns ON and stays ON to indicate the location of a problem component or its wiring. This LED
(when ON) indicates a defect in either the right or left rear modulator or sensor circuits. The defect may be
either the wiring or components. The REAR LED illuminates at the same timeas either the RIGHT or LEFT
LEDand either the MOD or SENS LED.
’RIGHT’ LED
This Red LED turns ON and stays ON to indicate the location of a problem component or its wiring. This LED
(when ON) indicates a defect on the right side (passenger) of the vehicle. The defect is in either the modulator
or sensor circuits. The defect may be either wiring or the components. The RIGHT LED turns on at the same
timeas either the FRONT or REAR LEDand either the MOD or SENS LED.
’LEFT’ LED
This Red LED turns ON and stays ON to indicate the location of a problem component or its wiring. This LED
(when ON) indicates a defect on the left side (driver side) of the vehicle. The defect is in either the modulator
or sensor circuits. The defect may be either wiring or the components. The LEFT LED illuminates at the same
timeas either the FRONT or REAR LEDand either the MOD or SENS LED.
’MOD’ LED
This Red LED turns ON and stays ON to indicate a permanent or intermittent open or short circuit in the
solenoids of one of the four modulators or the wiring connecting a modulator to the system. When this LED
is on,either the RIGHT OR LEFT LEDand either the FRONT OR REAR LED will also turn on to identify
the defect location.
’SENS’ LED
This Red LED turns ON and stays ON to indicate permanent or intermittent failure. The failures indicated are:
open or shorted wheel speed sensor, open or shorted wheel speed sensor wiring, wheel speed signal not
present or is not proper. When this LED is ON,either the RIGHT OR LEFT LEDand either the FRONT OR
REAR LED will also be ON to identify the defect location.
’ECU’ LED
This Red LED, when ON, indicates that the controller itself has failed. It stays ON for all ECU failures, except
low voltage. For voltages less than 9V DC, this LED turns on to indicate the controller is inoperative; however,
when the voltage again exceeds 9V DC, the LED will TURN ITSELF OFF.
’VOLT’ LED
This Green LED turns ON and stays ON during vehicle operation to indicate that vehicle power is reaching the
controller. If vehicle power is out of range for proper operation (below 11 vdc or above 17 vdc) this LED will
flash until power returns to the proper operating range.
’RESET’
Beneath the RESET area of the window display is a magnetically sensitive switch that is used to reset the
diagnostic system. The device will respond to a magnet (magnet strength must be capable of picking up 3
ounces). With the vehicle key at IGN, holding a magnet against the RESET will cause all LEDs to turn on as
long as the magnet is held against it. Resetting can only be done with the key at IGN.