Trouble Shooting: Notes
WARNING: This page is about a different car, the 1995 Oldsmobile Aurora and 1995 Buick Riviera. However, it is still accessible from the selected car via links, so may be relevant.
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 appropriate G-TESTS W/CODES article in the ENGINE PERFORMANCE section.
TESTS W/CODES - 3.8L - Riviera
TESTS W/CODES - 4.0L - Aurora
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 |
|---|---|
| Relay No. 1 | On Center Of Firewall |
| Relays No. 2 & 3 | In Underhood Relay Center, On Right Front Of Engine Compartment |