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 MANUALSCHEVROLET1986CHEVY VAN G20, 5.0 H, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSTESTINGCONTROL MODULE RESISTANCE CHECK
1986 Chevrolet Chevy Van G20, 5.0 H, Standard
Control Module Resistance Check
1986 Chevrolet Chevy Van G20, 5.0 H, StandardSECTION Control Module Resistance Check
- With control module disconnected and servo connected, probe terminal "C" to ground with ohmmeter. Reading should be 30-55 ohms. With servo disconnected probe terminal "C" to ground. Reading should be infinity (open circuit).
- With servo connected, probe terminals "F" to "H". Reading should be 15-25 ohms. With servo disconnected, probe terminal "F" to ground. Reading should be infinity (open circuit). With servo disconnected, probe terminal "H" to ground. Reading should be infinity (open circuit).
- With servo connected, probe terminal "K" to ground. Reading should be 30-55 ohms. With servo disconnected, probe terminal "K" to ground. Reading should be infinity (open circuit).
- With servo connected or disconnected, probe terminal "J" to ground. Reading should be 0 ohms (closed circuit).
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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.