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Pinpoint Tests HV: Electric Cooling Fan Clutch: Introduction

WARNING: TO AVOID THE POSSIBILITY OF PERSONAL INJURY OR DAMAGE TO THE VEHICLE, DO NOT OPERATE THE ENGINE UNTIL THE FAN BLADE HAS BEEN FIRST EXAMINED FOR POSSIBLE CRACKS AND SEPARATION. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY OR DEATH.

This pinpoint test is intended to diagnose the following:

Fig 1: Cooling Fan Clutch Connector
G13711356Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Ranger A 5
4
3
2
1
FSS
SIGRTN
VREF
FCV
VPWR
All other vehicles A 4
5
3
6
1
FSS
SIGRTN
VREF
FCV
VPWR

Powertrain Control Module (PCM) Connector 

For PCM connector views or Reference values, Refer to Reference Values.

Vehicle Pin Circuit
Ranger B44 E14 E30 B43 FSS SIGRTN
VREF
FCV
All other vehicles T52
T80
T82
B4
FSS
SIGRTN
VREF
FCV