LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lincoln >> 2001 >> LS 3.0 S, Standard >> Repair and Diagnosis >> Electrical >> Charging Systems >> Generators & Regulators >> System Tests >> Test C: System Overcharges
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test C: System Overcharges

  1. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Turn ignition on. Using NGS tester, perform Powertrain Control Module (PCM) self-test. If no DTCs are retrieved, go to next step. If any Diagnostic Trouble Codes (DTC) are retrieved, perform appropriate test in accordance with DTC retrieved. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  2. Turn ignition off. Disconnect NGS tester. Start engine. With engine running and all accessories turned off, measure voltage between battery terminals while varying engine speed. If voltage is less than 15 volts, go to next step. If voltage is greater than 15 volts, go to step  4 .
  3. Turn ignition off. Disconnect generator 3-pin harness connector. Start engine. Check generator output. See LOAD TEST  under ON-VEHICLE TESTING. If generator tests okay, go to next step. If generator does not test okay, replace generator. See GENERATOR  under REMOVAL & INSTALLATION.
  4. Measure voltage between ground and Red wire terminal at generator harness connector. If voltage is less than .5 volt from battery voltage, replace generator. See GENERATOR  under REMOVAL & INSTALLATION. If voltage is greater than .5 volt from battery voltage, repair high resistance in Red wire. See WIRING DIAGRAMS  .
scientia non olet · About LEMON Manuals