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Home >> Ford >> 1997 >> Mustang Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Power Window System) >> DTC B1400 >> One-Touch Relay Circuit Open

One-Touch Relay Circuit Open

WARNING: This page is about a different car, the 1997 Mercury Sable and 1997 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.

  1. Check Left Front Window PID

    Using New Generation Star (NGS) tester, access LFPWRLY PID from GEM. If PID reads SHORTVBAT, go to next step. If PID does not read SHORTVBAT, inspect relay terminals for corrosion or damage and repair as necessary. If terminals are okay, repeat self-test.

  2. Check For Shorted Relay

    With LFPWRLY PID still accessed, remove one-touch relay. If PID still reads SHORTVBAT, go to next step. If PID no longer reads SHORTVBAT, replace relay.

  3. Check Fuse Junction Panel

    Disconnect GEM from fuse junction panel. Remove one-touch relay from fuse junction panel. Turn ignition on. Measure voltage between one-touch relay socket terminal No. 86 and ground. See Figure. If battery voltage exists, replace fuse junction panel and retest system. If battery voltage does not exist, replace GEM and retest system.
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