Lumina V6-204 3.4L DOHC (1991)
With A/C
- Try the following checks before doing the System Diagnosis:
1. Check AC 2 and CLUST Fuse by visual inspection
2. Check that Blower Motor connector and High and Low Blower Relays are firmly seated.
3. If Blower runs in LO only, check YEL(51) wire to terminal E of Blower Switch for an open. If wire and connections are OK, replace Blower
Switch.
4. If Blower runs in LO or MEDIUM speeds with ignition OFF, check the following circuits for a short to voltage.
-
YEL (51)
-
PPL/WHT (73)
-
LT BLU (72)
- Go to the Heater and A/C System Check under A/C System Diagnosis for a guide to normal operation of entire system. See: Testing and Inspection
- Go to System Diagnosis for diagnostic tests of Blower Controls. See: System Diagnosis
Without A/C
- Try the following checks before doing the System Diagnosis:
1. Check AC 2 and CLUST Fuse by visual inspection
2. Check that ground G103 and G119 (L4 VIN R only) are clean and tight.
3. Check that Blower Motor connector and High and Low Blower Relays are firmly seated.
- Go to the Heater and A/C System Check under A/C System Diagnosis for a guide to normal operation of entire system. See: Testing and Inspection
- Go to System Diagnosis for diagnostic tests of Blower Controls. See: System Diagnosis