Chart C-12C-A - Cooling Fan No High Speed Rear Fan (3 Of 5) (3.8L "E" Body)

NOTE: Test numbers refer to test numbers on diagnostic charts.

1. Test light should be on because harness terminal No. 5 has B+ with ignition switch on. Terminal No. 1 has B+ at all times.
2. Test light should be on with output tests, Fan 2 selected and cycled on with Tech 1 scan tester.
3. Jumpering harness terminals No. 1 and 4 by-passes relay. If fan runs, relay is faulty.
4. Test light on proves circuits No. 1594 and 804 are okay; fan motor is faulty.

Fig 1: Chart C-12C-A Schematic (3.8L "E" Body) Cooling Fan Circuit Diagnosis (No High Speed Rear Fan)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Chart C-12C-A Flow Chart (3.8L "E" Body) Cooling Fan Circuit Diagnosis (No High Speed Rear Fan)

Courtesy of GENERAL MOTORS CORP.