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Home >> Ford >> 1997 >> Taurus G, AX4S >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window System >> DTC B1405 Or B1408 >> Left Front Window Circuit Short To Power
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Left Front Window Circuit Short To Power

  1. Check Down Circuit For Short

    Remove one-touch relay from fuse junction panel. Turn ignition on. Using voltmeter connected to ground, measure voltage at terminal No. 87A of one-touch relay socket. See Figure. If battery voltage exists, go to step 3). If battery voltage does not exist, go to next step.

  2. Check Up Circuit For Short

    With one-touch relay removed from fuse junction panel, turn ignition on. Using voltmeter connected to ground, measure voltage at terminal No. 30 of one-touch relay socket. If battery voltage exists, go to step 6). If battery voltage does not exist, replace one-touch relay.

  3. Check For Shorted Switch

    Disconnect left front window switch. Measure voltage at one-touch relay terminal No. 87A. If battery voltage exists, go to step 8). If battery voltage does not exist, go to next step.

  4. Check White/Black Wire For Short To Power

    Measure voltage on White/Black wire at left front window switch harness connector. If battery voltage exists, go to next step. If battery voltage does not exist, replace left front window switch and retest system.

  5. Check For Shorted GEM

    Disconnect GEM from fuse junction panel connector. Using a voltmeter connected to ground, measure voltage at one-touch relay socket terminal No. 30. See Figure. If battery voltage exists, go to next step. If battery voltage does not exist, replace GEM. Retest system.

  6. Check Fuse Panel For Short To Power

    Disconnect fuse junction panel connector C4. See Fig 1. Using a voltmeter connected to ground, measure voltage at harness connector C4, terminal No. 25 (Orange/White wire). If battery voltage exists, go to next step. If battery voltage does not exist, replace fuse junction panel. Retest system.
    Fig 1: Identifying Fuse Junction Panel Connector C4 Terminals
    G96F01342

  7. Check Orange/White Wire For Short To Power

    Disconnect left front window switch. Using a voltmeter connected to ground, measure voltage at harness connector C4, terminal No. 25 (Orange/White wire). If battery voltage exists, repair Orange/White wire for short to power. If battery voltage does not exist, repair White/Black wire for short topower.

  8. Check Tan/Light Blue Wire For Short To Power

    Disconnect fuse junction panel connector C4. See Fig 1. Using a voltmeter connected to ground, measure voltage at one-touch relay socket terminal No. 87A. See Figure. If battery voltage exists, go to next step. If battery voltage does not exist, repair Tan/Light Blue wire for short to power. Retest system.

  9. Check GEM

    Disconnect GEM from fuse junction panel connector. Using a voltmeter connected to ground, measure voltage at one-touch relay socket terminal No. 87A. See Figure. If battery voltage exists, replace fuse junction panel. If battery voltage does not exist, replace GEM. Retest system.
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