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Test H: One-Touch Down Feature Inoperative

WARNING: This page is about a different car, the 2000 Mercury Mountaineer, 2000 Ford Explorer, 1999 Mercury Mountaineer, and 1999 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: After all repairs, clear DTCs and retest system.
  1. Using NGS tester, observe GEM PID IGN_GEM while turning ignition switch through all positions. If PID IGN_GEM values agree with ignition switch positions, go to next step. If PID IGN_GEM values do not agree with ignition switch positions, check battery saver and accessory delay relays. See ACCESSORY DELAY RELAY  and BATTERY SAVER & ONE-TOUCH DOWN RELAYS  under COMPONENT TESTS. Check ignition switch. See STEERING COLUMN SWITCHES - EXPLORER & MOUNTAINEER article. Check ignition circuits. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
  2. Using NGS tester, retrieve and record continuous DTCs. Clear continuous DTCs. Perform GEM self-test. If no DTCs, or DTCs B1398 or B1400, are retrieved, go to next step. If DTC B1342 is retrieved, replace GEM. See GENERIC ELECTRONIC MODULE (GEM)  under REMOVAL & INSTALLATION.
  3. Turn ignition switch to RUN position. Using NGS tester, trigger GEM active command ACCY RLY on. Observe GEM PID D_PWRLY while triggering active command ONE TOUCH on and off. If PID D_PWRLY value agrees with command mode, go to step  9 . If PID D_PWRLY value does not agree with command mode and displays OFFO-G, go to next step. If PID D_PWRLY value does not agree with command mode and displays ON-B-, go to step  7 .
  4. Turn ignition off. Test one-touch down relay. See BATTERY SAVER & ONE-TOUCH DOWN RELAYS  under COMPONENT TESTS. If one-touch down relay is defective, replace relay. If relay is okay, go to next step.
  5. Remove accessory delay relay. Measure resistance between one-touch down relay socket terminal No. 2 and accessory delay relay socket terminal No. 30. See Figure and Figure . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Light Blue/Black wire.
  6. Turn ignition off. Disconnect negative battery terminal. Disconnect GEM 18-pin connector C283. Measure resistance between one-touch down relay socket terminal No. 1 and GEM connector C283 terminal No. 7. See Figure and Figure . If resistance is less than 5 ohms, replace GEM. See GENERIC ELECTRONIC MODULE (GEM)  under REMOVAL & INSTALLATION. If resistance is 5 ohms or more, repair open in Yellow/Red wire.
  7. Turn ignition off. Test one-touch down relay. See BATTERY SAVER & ONE-TOUCH DOWN RELAYS  under COMPONENT TESTS. If one-touch down relay is defective, replace relay. If relay is okay, go to next step.
  8. Turn ignition off. Disconnect negative battery terminal. Disconnect GEM 18-pin connector C283. Connect negative battery cable. Turn ignition switch to RUN position. Measure voltage between one-touch down relay socket terminal No. 1 and ground. See Figure . If there is any voltage, repair short to power in Yellow/Red wire. If there is no voltage, replace GEM. See GENERIC ELECTRONIC MODULE (GEM)  under REMOVAL & INSTALLATION.
  9. Turn ignition off. Test one-touch down relay. See BATTERY SAVER & ONE-TOUCH DOWN RELAYS  under COMPONENT TESTS. If one-touch down relay is defective, replace relay. If relay is okay, go to next step.
  10. Turn ignition switch to RUN position. Measure voltage between one-touch down relay socket terminal No. 5 and ground. Measure voltage between one-touch down relay socket terminal No. 2 and ground. See Figure . If each voltage is more than 10 volts, go to next step. If either voltage is 10 volts or less, repair appropriate Light Blue/Black wire(s). See WIRING DIAGRAMS  .
  11. Turn ignition off. Disconnect negative battery terminal. Disconnect GEM 18-pin connector C283. Disconnect left front window motor. Measure resistance between left front window motor connector Red wire terminal and GEM connector C283 terminal No. 10 (Gray wire). See Figure . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Red wire or Gray wire.
  12. Measure resistance between left front window motor connector Red wire terminal and GEM connector C283 terminal No. 2 (Orange/White wire). See Figure . If resistance is less than 5 ohms, replace GEM. See GENERIC ELECTRONIC MODULE (GEM)  under REMOVAL & INSTALLATION. If resistance is 5 ohms or more, repair open in Orange/White wire or Red wire.
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