Cooling Fan Motor

Disconnect cooling fan motor harness connector. Apply battery voltage to one of the fan motor terminals and jumper the other terminal to ground. Fan motor should activate. If fan motor does not activate, replace faulty fan motor.

NOTE: For a more specific system testing, refer to the following C-10 or C-12 diagnostic charts. If any chart other than a C-10 or C-12 chart is referenced, see appropriate G - TEST W/CODES article in this section.

NOTE: Test numbers refer to numbers on diagnostic charts.

Checks for low A/C refrigerant charge, causing A/C clutch not to engage.
This and the following tests check for faulty A/C control relay.

Fig 1: A/C Clutch Schematic (2.5L, 2.8L)

Courtesy of GENERAL MOTORS CORP.

Fig 2: A/C Clutch Circuit Flow Chart (2.5L & 2.8L) (1 Of 2)

Courtesy of GENERAL MOTORS CORP.