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Home >> Dodge and Ram >> 1993 >> Caravan Base, 3.0 3 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Connector Identification >> Test 15B - Diagnosing Blank Screen Compass/Mini-Trip Module
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Test 15B - Diagnosing Blank Screen Compass/Mini-Trip Module

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. Press step button one time. If compass/mini-trip screen is not blank, restart TEST 15A. If compass/mini-trip screen is still blank, gain access to compass/mini-trip module connector. Using DRB-II in voltmeter mode, backprobe fused ignition feed circuit at compass/mini-trip module connector terminal No. 7 (Tan wire).
  2. If voltage is less than 10 volts, go to step 4). If voltage is more than 10 volts, turn ignition switch to OFF position. Disconnect compass/mini-trip module connector. Check connector, and clean or repair connector as necessary.
  3. Using DRB-II in ohmmeter mode, measure resistance of system ground at compass/mini-trip module connector terminal No. 5 (Black/Light Green wire). If resistance is more than 5 ohms, repair open Black/Light Green wire. If resistance is less than 5 ohms, go to TEST 15C.
  4. If voltage is less than 10 volts in step 2), remove circuit breaker No. 25 from fuse panel. Probe Black/White wire (in fuse block) to circuit breaker No. 25. If voltage is more than 10 volts, go to step 7). If voltage is less than 10 volts, access ignition switch.
  5. Backprobe ignition feed (run/acc) circuit at ignition switch connector terminal No. 6 (Black/White wire). If voltage is more than 10 volts, repair open in Black/White wire. If voltage is less than 10 volts, backprobe battery feed circuit at ignition switch connector terminal No. 7 (Red wire).
  6. If voltage is more than 10 volts, replace ignition switch. If voltage is less than 10 volts, repair open Red wire.
  7. Disconnect compass/mini-trip module connector. Check connector, and clean or repair connector as necessary. Using DRB-II in ohmmeter mode, measure resistance of fused ignition feed circuit at circuit breaker No. 25 (Tan wire). If resistance is less than 5 ohms, repair short to ground in Tan wire. If resistance is more than 5 ohms, replace circuit breaker.
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