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Home >> Jeep >> 1994 >> Wrangler S, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Vehicle Communications Tests >> Test 2A - Blank DRB Message Screen
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Test 2A - Blank DRB Message Screen

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagram, see WIRING DIAGRAMS article in this section.
  1. Disconnect DRB. Using an external voltmeter, check Chrysler Collision Detection (CCD) Data Link Connector (DLC) positive battery circuit (Red wire) for voltage. Connector is located underneath dash at left side of steering column. If voltage is less than 10 volts, repair positive battery circuit as necessary. Perform TEST VER-1  .
  2. If voltage is more than 10 volts, turn ignition off. Using an external ohmmeter, check resistance between CCD DLC ground circuit (Black/Light Green wire) and ground. If resistance is more than 20 ohms, repair open ground circuit. Perform TEST VER-1  .
  3. If resistance is less than 20 ohms, try a different DRB cable. If DRB screen is no longer blank, replace defective DRB cable. Perform TEST VER-1  .
  4. If DRB screen is still blank, try a different DRB cartridge. If DRB screen is no longer blank, replace defective DRB cartridge. Perform TEST VER-1  . If DRB screen is still blank, replace defective DRB. Perform TEST VER-1  .
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