Trouble Shooting ("G", "P", "R", "V" Series)
NOTE:
This article contains test charts that are part of General Motors Computerized Engine Controls. Only those charts required to test electric cooling fans are included. Other diagnostic codes may appear while performing electric cooling fan diagnosis. For complete information on General Motors Computerized Engine Control systems see appropriate article in ENGINE PERFORMANCE section.
Trouble shoot cooling fan problems through the use of cooling fan circuit diagram and system diagnosis procedures. See Fig 1. For cooling fan relay location, see COOLING FAN RELAY LOCATION table.