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Home >> Nissan-Datsun >> 1973 >> 240Z Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Exhaust Emission Systems >> Testing >> Thermo Switch
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Thermo Switch

Switch is located on right side of dash near horn relay. Disconnect wires from switch and connect ohmmeter. Meter should read zero when temperature inside passenger compartment is above 55°F. If not, replace switch.