Auxiliary Blower

1. CHECK that RR HVAC Fuse 5, Blower Fuse 3, and ILLUM Fuse 14 are not open. If any fuse(s) is open, LOCATE and REPAIR source of overload. REPLACE 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 Auxiliary High Blower Relay, Auxiliary Medium Blower Relay, and Auxiliary 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 Auxiliary Blower Resistor Coils are contacting one another.