Test V: Low Coolant Level Chime Not Operating Properly

1999 Ford Taurus SE, 4D Sedan, 3.0 2, AX4SSECTION Test V: Low Coolant Level Chime Not Operating Properly
  1. Turn ignition switch to LOCK position. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Using NGS tester, perform Generic Electronic Module (GEM) self test. If no DTCs exist, go to next step. If any DTCs exist, repair them first.
  2. Disconnect engine coolant level switch harness connector C100. Using a fused jumper wire, connect terminals at engine coolant level switch harness connector C100. Turn ignition switch to RUN position. If LOW COOLANT indicator does not illuminate, go to next step. If LOW COOLANT indicator illuminates, replace engine coolant level switch.
  3. Turn ignition switch to LOCK position. Disconnect jumper wire. Measure resistance between ground and Black wire terminal at engine coolant level switch harness connector C100. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Black wire.
  4. Measure voltage at White/Light Blue wire terminal at engine coolant level switch harness connector C100. If greater than 10 volts exist, system is okay at this time. If voltage is 10 volts or less, repair open in White/Light Blue wire.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
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