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Home >> Ford >> 1988 >> Ranger 2D Pickup, 2.3 A, 4WD, M5OD-R1 >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Trouble Codes >> Code 4
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Code 4

  1. Unplug electro-hydraulic valve connector. Measure resistance between Light Blue/Red wires at valve and valve body. If resistance is less than 10,000 ohms replace electro-hydraulic valve. If resistance is 10,000 ohms or more, check resistance between Light Blue/Red wire and Black/White wire at valve.
  2. If resistance is more than 26,000 ohms or less than 18,000 ohms, replace electro-hydraulic valve. If resistance is 18,000-26,000 ohms, check resistance between Light Blue/Red wire at valve and valve body with hydraulic pressure applied for 30 seconds minimum.
  3. If resistance is less than 10,000 ohms, replace electro-hydraulic valve. If resistance is 10,000 ohms or more, check resistance between Black/White wire and ground at valve harness connector. If resistance is one ohm or more, repair open in Black/White wire. If resistance is less than one ohm, reconnect valve connector.
  4. Disconnect battery. Unplug control module connector. Measure resistance between pin No. 4 and pin No. 6 at module connector. If resistance is more than 26,000 ohms or lower than 18,000 ohms, repair open or short In Light Blue/Red wire between valve and control module. If resistance is 18,000-26,000 ohms, replace control module.
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