The A/C condenser fan does not run at high speed (but both fans run at low speed)

Diagnostic procedure
  1. A/C condenser fan high speed circuit troubleshooting
Also check for
  • HVAC DTCs
  • Blown fuse No. 15 (20 A) and No. 20 (7.5 A) in the under-hood fuse/relay box
  • Cleanliness and tightness of all terminals