Auxiliary Blower

1. CHECK that RR HVAC FUSE 5, A/C MAXI FUSE 3, and ILLUM FUSE 14 are not open. If either fuse is open, LOCATE and REPAIR source of overload and REPLACE the Fuse(s).
2. CHECK that Grounds G200 and G400 (Heater without A/C) or G400 (Heater with A/C) are clean and tight.
3. CHECK that Rear High Blower Relay, Rear Medium Blower Relay, and Rear Low Blower Relay are properly mated to their Connectors.
4. Heater Blower operations at Single Speed independent of Switch setting or variations in Blower speed while driving may indicate that the Rear Blower Resistor Coils are contacting one another.