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Home >> Dodge and Ram >> 1993 >> Caravan Base, 2.5 K, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Connector Identification >> Test 12D - Repairing No Response Condition Of Electro/Mechanical Instrument Cluster
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Test 12D - Repairing No Response Condition Of Electro/Mechanical Instrument Cluster

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. Perform TEST VER - 1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. If vehicle has coolant temperature, oil pressure or charging system problem, repair appropriate system. If vehicle does not have coolant temperature, oil pressure or charging system problem, turn ignition off.
  2. Disconnect Mechanical Instrument Cluster (MIC) connector. Using DRB-II in voltmeter mode, measure voltage of CCD bus positive circuit at MIC connector terminal No. 10 (Violet/Brown wire). If voltage is less than one volt, repair open circuit in Violet/Brown wire.
  3. If voltage is more than one volt, measure voltage of CCD bus negative circuit at MIC connector terminal No. 9 (White/Black wire). If voltage is less than one volt, repair open circuit in CCD bus negative wire.
  4. If voltage is more than one volt, use DRB-II in ohmmeter mode to measure resistance of signal ground circuit at MIC connector terminal No. 7 (Black/Light Green wire). If resistance is more than 100 ohms, repair open Black/Light Green wire.
  5. If resistance is less than 100 ohms, use DRB-II in voltmeter mode to measure voltage of fused ignition feed circuit at MIC connector terminal No. 11 (Dark Blue/White wire). If voltage is less than 10 volts, go to TEST 48B.
  6. If voltage is more than 10 volts, measure voltage of fused battery feed circuit at MIC connector terminal No. 2 (Pink wire). If voltage is more than 10 volts, replace MIC.
  7. If voltage is less than 10 volts, remove and inspect fuse No. 3. If fuse is blown, go to TEST 48C. If fuse is okay, reinstall fuse No. 3 and measure voltage of battery feed circuit (Black/Red wire), in fuse block, to fuse No. 3.
  8. If voltage is less than 10 volts, repair open Black/Red wire. If voltage is more than 10 volts, repair open Pink wire between fuse No. 3 and MIC.
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