Trouble Shooting: Notes

NOTE: This article contains test charts which are part of General Motors Computerized Engine Controls. Only those charts required to test electric cooling fans are included. Other diagnostic information may be referenced while performing electric cooling fan diagnosis. For complete information on General Motors Computerized Engine Control systems, see the G-TESTS W/CODES article in the ENGINE PERFORMANCE section.

Trouble shoot cooling fan using appropriate C-12 charts provided. See COOLING FAN CHART INDEX table. For cooling fan relay location, see COOLING FAN RELAY LOCATION table.

COOLING FAN RELAY LOCATION

Application

Location

"U" Series

⁽¹⁾ Behind Right Headlight, Near Fuel Evaporative Canister

⁽¹⁾	See Fig 1 . Relay locations vary. For relay wire color ID, see wiring diagram under WIRING DIAGRAMS .

Fig 1: Cooling Fan Relay Location

Courtesy of GENERAL MOTORS CORP.