Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1993PICKUP F250, 2D PICKUP, 5.0 N, STANDARD, M5OD-R2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 38 (ANTI-LOCK)DIAGNOSISTROUBLE CODESCODE 2 (OPEN ISOLATE CIRCUIT)
1993 Ford Pickup F250, 2D Pickup, 5.0 N, Standard, M5OD-R2
Code 2 (Open Isolate Circuit)
1993 Ford Pickup F250, 2D Pickup, 5.0 N, Standard, M5OD-R2SECTION Code 2 (Open Isolate Circuit)
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 1992 Ford Ranger, 1992 Ford RV Cutaway, 1992 Ford Pickup, 1992 Ford Explorer, and 1992 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition off. Disconnect battery. Unplug control module harness connector. Measure resistance between module connector pin No. 13 and ground. If resistance is 6 ohms or less, replace control module, and retest system.
- If resistance is greater than 6 ohms, reconnect module connector. On Bronco, "E" and "F" Series, disconnect electro-hydraulic valve connector. On all others, go to step 4). On Bronco, "E" and "F" Series, measure resistance between ground pin (harness side) and ground. See Fig 1 .
- If resistance is one ohm or more, repair open in ground circuit wire. If resistance is less than one ohm, measure resistance between isolation solenoid pin and ground pin on valve side. See Fig 1 . If resistance is 6 ohms or less, repair open between isolation solenoid valve and control module.
- On all others, disconnect electro-hydraulic valve connector. See Fig 1 . Measure resistance between isolation solenoid pin and ground pin on valve side. If resistance is greater than 6 ohms, replace electro-hydraulic valve and retest. If resistance is 6 ohms or less, repair open between isolation solenoid valve and control module.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.