LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1997 >> Taurus SHO >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window System >> DTC B1398 >> One-Touch Relay Circuit Open
April 5, 2026: LEMON Manuals is launched! Read the announcement.

One-Touch Relay Circuit Open

  1. Check Left Front Window Up Operation

    Turn ignition on. Press left front window up switch. If window goes up, go to next step. If window does not go up, go to step 4).

  2. Check Signal From GEM

    Remove one-touch relay (located in fuse junction panel). Using an ohmmeter connected to ground, measure resistance between one-touch down relay socket terminal No. 85 and ground. See Figure. Using NGS scan tester, access ACTIVE COMMANDS. Select ONE TOUCH DOWN and ACCDLY from PID menu. Press trigger to activate relays. Measure resistance at terminal No. 85. If resistance is less than 5 ohms, replace one-touch down relay and retest. If resistance is greater than 5 ohms, go to next step.

  3. Check For Open In Fuse Panel

    Disconnect fuse panel connector C1. See Figure. Measure resistance between connector C1, terminal No. 7 and one-touch relay socket terminal No. 85. See Figure. If resistance is less than 5 ohms, replace GEM. If resistance is greater than 5 ohms, replace fuse junction panel.

  4. Check Power To One-Touch Relay

    Remove one-touch relay. Turn ignition on. Check voltage between ground and one-touch relay socket terminals No. 86 and 87 individually. If battery voltage exists, go tostep 10). If battery voltage does not exist, go to next step.

  5. Check Door Lock Operation

    Operate power door locks. If power door locks operate, go to step 8). If power door locks do not operate, go to next step.

  6. Check Power To Fuse Junction Panel

    Disconnect fuse junction panel connector C3. See Fig 1. Using a voltmeter connected to ground, measure voltage at connector C3, terminal No. 1 (Black/White wire). If battery voltage exists, replace fuse junction panel. If battery voltage does not exist, go to next step.
    Fig 1: Identifying Fuse Junction Panel Connector C3 Terminals
    G96D01341

  7. Check Black/White Wire For Short

    Remove maxi-fuse No. 4 (30-amp) from power distribution box. Measure resistance between fuse junction panel connector C3, terminal No. 1 (Black/White wire) and ground. If resistance is greater than 10 k/ohms, repair open Black/White wire. If resistance is less than 10 k/ohms, repair short to ground in Black/White wire. Replace fuse and retest system.

  8. Check For Open Fuse Panel

    Remove accessory delay relay. Measure resistance between delay relay socket terminal No. 87 and one-touch down relay socket terminal No. 87. If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, replace fuse junction panel.

  9. Check Power To Delay Relay

    Using voltmeter connected to ground, measure voltage at delay relay socket terminal No. 30. If battery voltage exists, replace accessory delay relay. If battery voltage does not exist, replace fuse junction panel.

  10. Check For Shorted One-Touch Relay

    Remove one-touch relay. Measure resistance between ground and one-touch relay socket terminal No. 85. If resistance is less than 10 k/ohms, go to next step. If resistance is greater than 10 k/ohms, replace one-touch relay.

  11. Check For Shorted GEM

    Disconnect GEM from fuse junction panel. Remove one-touch relay from fuse junction panel. Measure resistance between one-touch relay socket terminal No. 85 and ground. See Figure. If resistance is less than 10 k/ohms, replace fuse junction panel. If resistance is greater than 10 k/ohms, replace GEM and retest system.
scientia non olet · About LEMON Manuals