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Test J: Courtesy Lights Stay On

WARNING: This page is about a different car, the 2002 Lincoln Blackwood and 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to LOCK position. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below left side of instrument panel, right of steering column. Using NGS tester, monitor PID IGN_GEM while turning ignition switch from LOCK to RUN position. If PID values agree with ignition switch position, go to next step. If PID values do not agree with ignition switch position, repair open in appropriate wire. See POWER DISTRIBUTION in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
  2. Perform self-test on Generic Electronic Module (GEM). If no DTCs are retrieved, go to next step. If DTC B1322, B1330, B1334, B1338 or B1574 are retrieved, go to step  8. If DTC B1342 is retrieved, replace GEM. See appropriate MODULE COMMUNICATIONS NETWORK article.
  3. Using NGS tester in active command, turn INT LAMPS ON and OFF while monitoring PID INTLMP. If PID INTLMP does not agree with active command and displays OFFO-G, go to next step. If PID does agree with active command, go to step  8.
  4. Remove interior light relay. Interior light relay is located in central junction box. Check interior light relay for proper operation. See MICRO ISO RELAY  under COMPONENT TESTS. If interior light relay is okay, go to next step. If interior light relay is defective, replace interior light relay, clear DTCs and retest system.
  5. Disconnect headlight switch harness connector C205a. If courtesy lights do not turn off, go to next step. If courtesy lights turn off, replace headlight switch. See HEADLIGHT SWITCH  under REMOVAL & INSTALLATION.
  6. Ensure ignition switch is in LOCK position. Disconnect central junction box harness connector C270a. Central junction box is located under left side of instrument panel. Measure resistance between ground and central junction box harness connector C270a terminal No. 22 (Orange/Light Green wire). See Figure. If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, repair short to ground in Orange/Light Green wire between central junction box and head light switch. See WIRING DIAGRAMS .
  7. Disconnect GEM from central junction box. Reconnect central junction box harness connector C270a. Measure resistance between ground and interior light relay connector terminal No. 1. See Figure. If resistance is 10 k/ohms or less, replace central junction box. If resistance is more than 10 k/ohms, replace GEM and perform self-test. See appropriate MODULE COMMUNICATIONS NETWORK article.
  8. Using NGS tester, monitor PID P_DR_SW while opening and closing right front door. Monitor PID D_DR_SW while opening and closing left front door. Monitor PID RRDR_SW while opening and closing right rear door. Monitor PID LRDR_SW while opening and closing left rear door. Monitor PID PTC_Ajar SW while opening and closing the power tonneau cover. If PID does not agree with door positions, go to next step. If PID agrees with door positions, go to step  11.
    9. NOTE: If PID PTC_Ajar SW is indicated, disconnect left and right tonneau cover latches.
  9. Disconnect inoperative door ajar switch harness connector. If courtesy lights do not turn off, go to next step. If courtesy lights turn off, replace defective door ajar switch.
  10. Disconnect GEM harness connector C201a. Measure resistance between ground and each door ajar input at GEM harness connector C201a. See Fig 1. See DOOR SWITCH TERMINAL & WIRE COLOR IDENTIFICATION  table. If resistance is more than 10 k/ohms, replace GEM and perform self test. See appropriate MODULE COMMUNICATIONS NETWORK article. If resistance is 10 k/ohms or less, repair open in appropriate wire. See WIRING DIAGRAMS .
  11. Disconnect interior light relay. Interior light relay is located in central junction box. If courtesy lights do not turn off, go to next step. If courtesy lights turn off, replace interior light relay and retest system.
  12. Disconnect central junction box harness connector C270a. If courtesy lights turn off, replace central junction box and retest system. If courtesy lights do not turn off, repair short to voltage in Black/Light Blue wire between central junction box and splice S419. Splice S419 is located behind left kick panel. See WIRING DIAGRAMS .
Fig 1: Identifying Generic Electronic Module Harness Connector C201a Terminals
G97A28803Courtesy of FORD MOTOR CO.
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