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 MANUALSCHEVROLET1987CHEVY VAN G20, 6.2 C, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSDIAGNOSIS & TESTINGMULTI-FUNCTION CONTROL SWITCH TEST
1987 Chevrolet Chevy Van G20, 6.2 C, Automatic
Multi-Function Control Switch Test
1987 Chevrolet Chevy Van G20, 6.2 C, AutomaticSECTION Multi-Function Control Switch Test
- Using a voltmeter or test light, test cruise switch at connector mounted on steering column. With slider switch in "OFF" position and set/coast button not depressed, reading should be infinity (open circuit) at all wire terminals. See Fig 1 .
- With slider switch in "ON" position and set/coast button not depressed, reading should be infinity (open circuit) at all terminals except 12 volts at Green/Blue wire terminal.
- With slider switch in "R/A" position and set/coast button not depressed, reading should be infinity (open circuit) at wire terminals Yellow/Red, Green/Red, and Red/Blue. Reading should be 12 volts at wire terminals Yellow/Green, Yellow/Blue, and Green/Blue. See Fig 1 .
- With slider switch in "OFF" position and set/coast button depressed, reading should be infinity (open circuit) at all wire terminals except 12 volts at Green/Red wire terminal.
- With slider switch in "ON" position and set/coast button depressed, reading should be infinity (open circuit) at wire terminals Yellow/Green, Yellow/Red, and Yellow/ Blue. Reading should be 12 volts at wire terminals Green/Red, Green/Blue, and Red/Blue. See Fig 1 .
- With slider switch in "R/A" position and set/coast button depressed all wire terminals should be 12 volts.
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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.