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Home >> Pontiac >> 1984 >> 1000 4D Hatchback, 1.8 D, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - 4-CYL Diesel >> Testing >> Glow Plug System >> Thermo Switch
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Thermo Switch

Submerge end of thermo switch in water and gradually raise water temperature. Check continuity across terminal and body. If no continuity above 122°F (50°C), replace switch.