Thermo Switch

1985 Chevrolet S10 Blazer 2.8 B, RWD, AutomaticSECTION Thermo Switch

Continuity should exist when switch temperature is lower than 117-127°F (47-53°C). No continuity should exist when above 127°F (53°C). If switch does not operate properly, replace it.

Fig 1: Glow Plug System Wiring Diagram
G9764
RENDER: 1.0x

NO RELATED

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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.