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 MANUALSDODGE AND RAM1977RAM WAGON B300, VAN PASSENGER EXTENDED, 7.2L ENG VIN DREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSSPEED CONTROL SYSTEMS - AUTOMATICTESTINGSPEED CONTROL SWITCH
1977 Dodge and Ram Ram Wagon B300, Van Passenger Extended, 7.2L Eng VIN D
Speed Control Switch
1977 Dodge and Ram Ram Wagon B300, Van Passenger Extended, 7.2L Eng VIN DSECTION Speed Control Switch
- Disconnect 4-wire connector at steering column. Connect a 12 volt positive source to black wire terminal in speed control harness connector (male). With switch in "ON" position, connect a test lamp between connector yellow wire and ground. Lamp should light and then go out when "SPEED SET" button is depressed.
- Move test lamp lead to connector blue wire. Lamp should light with switch in "ON" position and go out when switch is turned to "OFF" position. With switch in "ON" position, move test lamp lead to connector white wire. Lamp should light by either depressing "SPEED SET" button or by moving switch to "RESUME" position.
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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.