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 MANUALSGMC1992VALUE VAN 4.3 Z, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 135 (CRUISE CONTROL SYSTEM)TESTINGSPEED (CRUISE) CONTROL CIRCUIT
1992 GMC Value Van 4.3 Z, Automatic
Speed (Cruise) Control Circuit
1992 GMC Value Van 4.3 Z, AutomaticSECTION Speed (Cruise) Control Circuit
WARNING: This page is about a different car, the 1995 Dodge Ram Wagon and 1995 Dodge Ram Van. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition off. Disconnect Powertrain Control Module (PCM) 60-pin connector. Connect negative lead of voltmeter to known good chassis ground. Turn ignition on. Using positive lead of voltmeter, probe PCM connector terminal No. 33 (Tan/Red wire).
- With speed (cruise) control switch in OFF position, voltmeter reading should be zero volts. With switch in ON position, reading should be battery voltage. Repair circuit as necessary.
- Using positive lead of voltmeter, probe PCM connector terminal No. 53 (Light Green/Red wire). With speed (cruise) control switch in OFF position, voltmeter reading should be zero volts. With switch in ON position, reading should be battery voltage. Repair circuit as necessary.
- Using positive lead of voltmeter, probe PCM connector terminal No. 48 (Brown/Red wire). With speed (cruise) control switch in OFF position, voltmeter reading should be zero volts. With switch in ON position, reading should be battery voltage. Pressing SET/COAST button should cause voltmeter reading to change from battery voltage to zero volts as long as switch is held. Replace switch or repair circuit as necessary.
- Using positive lead of voltmeter, probe PCM connector terminal No. 50 (White/Light Green wire). With speed (cruise) control switch in OFF or ON position, voltmeter reading should be zero volts. With switch in either RESUME or SET position, reading should be battery voltage. Replace switch or repair circuit as necessary.
- Using positive lead of voltmeter, probe PCM connector terminal No. 49 (Yellow/Red wire). With speed (cruise) control switch in OFF position, voltmeter reading should be zero volts. With switch in ON position, reading should be battery voltage. With switch in either RESUME or SET position, reading should be battery voltage. Replace switch or repair circuit as necessary.
- Turn ignition off. Connect one lead of ohmmeter to good chassis ground. Using other lead, probe PCM connector terminal No. 29 (White/Pink wire). With brake pedal released, ohmmeter should indicate continuity. With brake pedal depressed, ohmmeter should indicate no continuity (open circuit). Replace switch or repair circuit as necessary.
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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.