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 MANUALSFORD1994F 250 2WD PICKUP V8-302 5.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSFF - POWER STEERING PRESSURE (PSP) SWITCHFF8 - CHECK PSPS STATE WITH KOEO VS. KOERFEDERAL (49 STATE)
1994 Ford F 250 2WD Pickup V8-302 5.0L
Federal (49 State)
1994 Ford F 250 2WD Pickup V8-302 5.0LSECTION Federal (49 State)
- Key "OFF".
- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
- Install breakout box and connect PCM to breakout box.
- Reconnect Power Steering Pressure (PSP) switch.
- Key "ON", engine "OFF".
- Measure resistance between test pin 24 and test pin 46 at the breakout box.
- Start engine.
- Does resistance remain less than 10 ohms between Key On Engine Off (KOEO) and Key On Engine Running (KOER)?
Yes -- Go to FF9. FF9 - Check PSPS State With Engine Running and Load vs. No Load
No -- Replace PSP switch. Remove breakout box. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)
RENDER: 1.0x
NO RELATED
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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.