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 MANUALSFORD1991CAB & CHASSIS 5.8 H, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 5.8LRETRIEVING CODES
1991 Ford Cab & Chassis 5.8 H, Automatic
Retrieving Codes
1991 Ford Cab & Chassis 5.8 H, AutomaticSECTION Retrieving Codes
Service codes are retrieved from the EEC-IV system through the self-test connector. Various methods and test equipment may be used to access these codes. The following test equipment may be used:
- Analog Volt-Ohmmeter (VOM)
- "Scan" Tool
- STAR Series Tester
- In-Dash "CHECK ENGINE" or "SERVICE ENGINE SOON" Light
SELF-TEST CONNECTOR LOCATIONS
| Application | Location |
|---|---|
| Aerostar | Left front inner fender panel |
| Bronco & "F" Series Pickups | Left front inner fender panel |
| "E" Series Econoline/Club Wagon | Right front inner fender panel |
| Explorer & Ranger | Right front inner fender panel |
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.