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THERMO-Time Switch: Fiat

  1. Disconnect connector from cold start injector. Connect test light between terminals, operate starter and note time test light stays lit. No light should be present if coolant temperature is above 95°F (35°C) and should glow for 1-8 seconds at temperatures below 95°F (35°C).
  2. If light does not perform as described, check relay and wiring. If good, replace thermo-time switch.