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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 41, Delay Pot Circuit (CKT Open Or Shorted To Battery) >> Testing
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DTC 41, Delay Pot Circuit (CKT Open Or Shorted To Battery): Testing

  1. Turn ignition switch to OFF position. Disconnect headlight switch connector C1. Turn ignition switch to RUN position. Using DVOM, measure voltage between headlight switch connector C1 terminal "F" and ground. If battery voltage is present, repair short to battery in return signal circuit. If battery voltage is not present, go to next step.
  2. Turn ignition switch to OFF position. Disconnect CCM connector C2. Connect a fused jumper wire between CCM connector C2 terminal C16 and ground. Using DVOM, check for continuity between headlight switch connector C1 terminal "F" and ground. If resistance is not 0-5 ohms, repair open in return signal circuit. If resistance is 0-5 ohms, go to next step.
  3. Turn ignition switch to RUN position. Using DVOM, measure voltage between headlight switch connector C1 terminal "F" and ground. If battery voltage is present, repair short to battery in twilight delay pot circuit. If battery voltage is not present, go to next step.
  4. Turn ignition switch to OFF position. Disconnect CCM connector C1. Connect a fused jumper wire between CCM connector C1 terminal B3 and ground. Using DVOM, check for continuity between headlight switch connector C1 terminal "A" and ground. If resistance is not 0-5 ohms, repair open in twilight delay pot circuit. If resistance is 0-5 ohms, go to next step.
  5. Using DVOM, measure voltage between ground and headlight switch terminals "A" and "F". If battery voltage is present, replace headlight switch. If battery voltage is not present, go to next step.
  6. Using DVOM, check for continuity between headlight switch terminals "A" and "F". If resistance is about 50-4250 ohms, replace headlight switch. If resistance is not about 50-4250 ohms, 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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