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 RAM1982400 L4-135 2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)TESTING AND INSPECTION
1982 Dodge and Ram 400 L4-135 2.2L SOHC
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
1982 Dodge and Ram 400 L4-135 2.2L SOHCSECTION Testing and Inspection
Fig 2 Spark Control Computer 10-Wire Connector:
NOTE: Grounding the carburetor switch eliminates spark advance on most models. On models with feedback carburetor it also provides a fixed fuel/air ratio.
1. With ignition switch in "OFF," position, disconnect 10-wire harness connector from "Spark Control Computer."
2. With throttle completely closed, check continuity between terminal 7 and the engine ground, see figure. Continuity should exist. If not, check wiring and carburetor switch.
3. With throttle opened, check continuity between terminal 7 and the engine ground, Fig. Continuity should not exist.
RENDER: 1.0x
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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.