The A/C condenser/radiator fans do not run at low speed with the A/C on, but the blower and heater controls work normally
Diagnostic Procedure
Probable cause: A/C condenser/radiator fan low speed circuit malfunction

Also Check for
Blown fuse No. B12 (30 A) in the under-hood fuse/relay box
Poor ground at G301
Poor or loose connections at the terminals