Tahoe 4WD V8-393 6.5L DSL Turbo VIN S (1995)
Radiator Cooling Fan Motor: Component Tests and General Diagnostics
When the Ignition Switch is on the RUN, BULB TEST or START positions, voltage is applied to the coil (power side) of the Auxiliary Cooling Fan
Relay through the IGN E Fuse. Ground is supplied to the coil (ground side) of the Auxiliary Cooling Fan Relay through either the Auxiliary Cooling Fan
Temperature Switch, High Pressure Switch or the A/C Controller. When either of the above three components provide ground to the coil of the Auxiliary
Cooling Fan Relay, it energizes and the contacts close. Voltage is applied through the AUX FAN Fuse and the closed contacts of the Auxiliary Cooling
Fan Relay to the Auxiliary Cooling Fan Motor. Since the Auxiliary Cooling Fan Motor is grounded at G112, it runs.