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 MANUALSFORD1984ECONOLINE E150, VAN WINDOW EXTENDED, 5.8 HREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM5.0L/5.8L EEC IV TESTINGCIRCUIT TESTINGHOW TO USE THE CIRCUIT TESTSOUTPUT STATE TEST
1984 Ford Econoline E150, Van Window Extended, 5.8 H
Output State Test
1984 Ford Econoline E150, Van Window Extended, 5.8 HSECTION Output State Test
- These checks are specified in the testing charts. Output State Test is used to diagnose each actuator. Test is performed in the KEY ON-ENGINE OFF (KOEO) SELF-TEST mode after service codes have been sent. DO NOT disable self-test, but momentarily depress throttle and release. All auxiliary EEC outputs will be activated at this time. Another throttle depression will turn them off.
- Connect DVOM to self-test output pin 4. Start the KEY ON-ENGINE OFF (KOEO) SELF-TEST . When Continuous codes are completed, DVOM will read 0 volts. Depress accelerator to turn on actuators.
- Disconnect DVOM from pin 4 and connect to appropriate actuator. Measure voltage at actuator. Readings above 10.5 volts indicate actuators are on, readings below 2 volts indicate actuators are off. Each test will tell what action to take according to voltage shown on DVOM.
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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.