The A/C condenser/radiator fans do not run at high speed, but do run at low speed with the A/C on
Diagnostic Procedure
Probable cause: Malfunction in the fan(s) high speed circuit

Do the following troubleshooting as needed:
Also Check for
Blown fuses No. B23 (30 A) and No. B31 (7.5 A) in the under-hood fuse/relay box
Poor ground at G301
Poor or loose connections at the terminals