COOLING FANS RUN W/IGNITION OFF (REPL. FAN MOTOR/RELAYS. Cadillac Fleetwood Brougham 1993

SUBJECT: COOLING FANS RUN WITH IGNITION OFF (REPLACE FAN MOTOR/ REPLACE FAN RELAYS/INSTALL DIODE)

MODELS: 1993 CADILLAC FLEETWOOD AND FLEETWOOD BROUGHAMS (EQUIPPED WITH ELECTRIC COOLING FANS)

SOME OWNERS MAY EXPERIENCE AN INTERMITTENT CONDITION OF FAN(S) CONTINUING TO RUN AFTER IGNITION OFF. THIS CONDITION MAY BE CAUSED BY COOLING FAN RELAY(S) REMAINING IN THE ENERGIZED POSITION.

TO DIAGNOSE AND REPAIR THIS CONDITION PERFORM THE FOLLOWING PROCEDURE:

1. MEASURE THE START UP AND STEADY STATE (FAN RUNNING) CURRENT DRAW OF THE PRIMARY AND SECONDARY FAN MOTORS. REPLACE THE FAN MOTOR IF THE CURRENT DRAW EXCEEDS:

O 70 AMPS AT START UP O 18 AMPS AT STEADY STATE

2. REPLACE THE COOLING FAN RELAY(S), P/N 12088572, FOR THE FAN(S) THAT REMAINED RUNNING AT IGNITION OFF.

3. INSTALL DIODE, P/N 12112422, OR EQUIVALENT (3 AMPS/400 VOLTS DIODE) AT EACH FAN MOTOR CONNECTOR. REFER TO FIGURE 1.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

FOR WARRANTY PURPOSES USE LABOR OPERATION N2850 TO INSTALL COOLING FAN RELAY; LABOR OPERATION N6270 TO INSTALL DIODE; AND LABOR OPERATIONS J3400 TO REPLACE SECONDARY FAN MOTOR, J3401 TO REPLACE PRIMARY FAN MOTOR, OR J3407 TO REPLACE BOTH FAN MOTORS.

FIGURES: 1

Object Number: 95406 Size: FS

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.