2002 silverado blower fan

[Silver6843]

Has anyone experienced this problem,my 02 silverado blower fan had somehow came on or stayed on low when the ignition was off and truck locked for the night. Had to boost the truck because it ran battery down. The resistor is operating on all speeds. Thanks for any ideas.

[gmtech4]

resistor has failed ,,,,resistor has power at all times

 

replace the connector as well,...

 

Document ID: 778902

Blower Controls–w/Heat and
A/C

[ujtruck]

man I didn't know Blower Motor Relay built in to the resistor network, for sure relay must be stuck at closed position, else blower defective motor switch

 

^^^ 1 + Rob and thanks for the nice diagram

[gmtech4]

welcome,