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Home >> Cadillac >> 1996 >> Fleetwood Base >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Central Control Module >> Diagnosing & Repairing CCM DTCS >> DTC 35, Parking Light Enable Circuit (CKT Shorted To Battery) >> Testing
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DTC 35, Parking Light Enable Circuit (CKT Shorted To Battery): Testing

  1. Turn ignition switch to OFF position. Remove parking light relay. Turn ignition switch to RUN position. Using DVOM, measure voltage between parking light relay connector terminal E3 and ground. If voltage is not present, go to step 5). If voltage is present, go to next step.
  2. Turn ignition switch to OFF position. Disconnect headlight switch connector. Turn ignition switch to ON position. Using DVOM, measure voltage between parking light relay connector terminal E3 and ground. If voltage is not present, replace headlight switch. If voltage is present, go to next step.
  3. Turn ignition switch to OFF position. Disconnect RCDLR/TD module connector. Turn ignition switch to ON position. Using DVOM, measure voltage between parking light relay connector terminal E3 and ground. If voltage is not present, replace RCDLR/TD module. If voltage is present, go to next step.
  4. Check for short to battery in parking light enable circuit. If circuit is okay, turn ignition switch to OFF position. Check for poor connections at CCM connector. If connections are okay, reconnect CCM connector and all other components. Clear DTCs and check if DTC resets. If DTC resets, replace CCM. If DTC does not reset, problem may be intermittent. Try to recreate fault while performing test by wiggling wiring and connectors. Check for poor connections at all connectors that may be causing intermittent condition.
  5. Turn ignition switch to OFF position. Using DVOM, check for continuity between parking light relay terminals E3 and D3. If continuity is present, replace relay. If continuity is not present, go to next step.
  6. Using DVOM, measure resistance between parking light relay terminals E3 and D3. Resistance should be 70-150 ohms. If resistance is not as specified, replace relay. If resistance is as specified, no problem is found. Problem may be intermittent. Go to next step.
  7. Turn ignition switch to OFF position. Check for poor connections at CCM connector. If connections are okay, reconnect CCM connector and all other components. Clear DTCs and check if DTC resets. If DTC resets, replace CCM. If DTC does not reset, problem may be intermittent. Try to recreate fault while performing test by wiggling wiring and connectors. Check for poor connections at all connectors that may be causing intermittent condition.
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