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Test 10A - Bus (+) & Bus (-) Shorted Together

WARNING: This page is about a different car, the 1994 Plymouth Acclaim, 1994 Dodge Spirit, and 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS. After each repair, perform TEST VER-1.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Using DRB, indicate whether vehicle is equipped with specific module. See MODULE APPLICATIONS table under IDENTIFICATION. Turn ignition off. Disconnect Transmission Control Module (TCM) connector, if equipped. TCM is located on left side of engine compartment near cowl. Turn ignition on. If DRB does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace TCM.
  2. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, turn ignition off and disconnect Powertrain Control Module (PCM). PCM is located between Data Link Connector (DLC) and battery, on fenderwell. Turn ignition on. If DRB does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace PCM.
  3. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, turn ignition off and disconnect Controller Anti-Lock Brake (CAB), if equipped. CAB is located on left fenderwell of engine compartment, behind anti-lock brake pump motor. Turn ignition on. If DRB does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace CAB.
  4. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, turn ignition off and disconnect traveler module, if equipped. Traveler module is located in bottom of center section of dash. Turn ignition on. If DRB does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace traveler module.
  5. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, turn ignition off and disconnect Mechanical Instrument Cluster (MIC) or Electronic Instrument Cluster (EIC). Turn ignition on. If DRB does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace MIC or EIC.
  6. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, turn ignition off and disconnect Vehicle Theft Security System (VTSS) module, if equipped. VTSS module is located in back of glove box. Turn ignition on. If DRB does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace VTSS module. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, turn ignition off and wait 5 minutes.
    CAUTION: Ensure ignition is off for 5 minutes before proceeding.
  7. Disconnect Air Bag System Control Module (ABSCM). ABSCM is located under center of instrument panel. Turn ignition on. If DRB does not display BUS SHORT TO 5 VOLTS, replace ABSCM.
  8. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, turn ignition off. Disconnect Overhead Traveler Information System (OTIS) module, if equipped. OTIS is located at center of roof, above visors. Turn ignition on. If DRB does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace OTIS.
  9. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, turn ignition off and disconnect Body Control Module (BCM) connectors, if equipped. BCM is located behind right kick panel. Turn ignition on. If DRB does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace BCM. If DRB displays BUS (+) & BUS (-) SHORTED TOGETHER, disconnect DRB.
  10. Using an external ohmmeter, check resistance between DLC terminals No. 3 (White/Black wire) and No. 4 (Violet/Brown wire). If resistance is less than 5 ohms, repair short between Violet/Brown and White/Black wires. If resistance is more than 5 ohms, replace DRB cable or cartridge as necessary.
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