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 MANUALSPLYMOUTH1984HORIZON L4-97 1.6L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)DESCRIPTION AND OPERATIONCOOLANT TEMPERATURE SWITCH
1984 Plymouth Horizon L4-97 1.6L SOHC
Coolant Temperature Switch
1984 Plymouth Horizon L4-97 1.6L SOHCSECTION Coolant Temperature Switch
Fig. 2 Coolant switch location. 4-97 engine:
On four cylinder engines the coolant switch, Fig. 2, is located on the thermostat housing. It supplies a signal to the computer when the engine coolant temperature is below 150°F. This information is required to prevent a change in air fuel ratio until engine operating temperature is reached.
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.