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*RADIATOR COOLING FAN INOPERATIVE (CONTINUED) POSSIBLE CAUSES FUSED B(+) CIRCUIT OPEN GROUND CIRCUIT OPEN RADIATOR FAN CONTROL MODULE OUTPUT CIRCUIT OPEN RADIATOR FAN CONTROL MODULE GROUND CIRCUIT OPEN RADIATOR FAN CONTROL CIRCUIT OPEN RADIATOR FAN CONTROL MODULE RADIATOR FAN MOTOR POWERTRAIN CONTROL MODULE For a complete Radiator Cooling Fan Circuit Diagram, (Refer to 7 - COOLING - SCHEMATICS AND DIAGRAMS). Diagnostic Test 1. ACTUATE RADIATOR COOLING FAN WITH DRB III T Turn the ignition on. With the DRB III T , actuate the Radiator Cooling Fan. Is the Radiator Cooling Fan operating? Yes >> Replace the Powertrain Control Module. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/POW- Perform POWERTRAIN VERIFICATION TEST - VER 3. No >> Go to 2 2. CHECKING THE PCM FOR AN OPEN Turn the ignition off. Disconnect the Powertrain Control Module C4 harness connector. Note: Check connectors — Clean/repair as necessary. Connect a jumper wire between ground and the Radiator Fan Control Is the Radiator Cooling Fan operating? Yes >> Replace the Powertrain Control Module. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/POW- Perform POWERTRAIN VERIFICATION TEST - VER 3. No >> Go to 3 ZH COOLING - ELECTRICAL DIAGNOSTICS 7 - 3 |