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Home >> Jaguar >> 1983 >> XJ-S >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - LUCAS/BOSCH P >> Testing >> THERMOTIME Switch Test >> Coolant Temperature Higher Than Switch Rating

Coolant Temperature Higher Than Switch Rating

  1. Disconnect negative battery cable and thermotime switch connector. Connect an ohmmeter between terminal W of thermotime switch and ground.
  2. Resistance should be high or infinite. Replace switch if low resistance or a short circuit reading is obtained.
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