Lumina 2004 LS AC Fans not working
 

Hi recently bought Lumina 2004 LS. both radiator fan clicks when temperature is very high (about to reach red). Also I have noticed when the AC switched on fans are not running continuously, works for few seconds and went off.

I have already tried replacing the thermostat and two relays .

Did anyone experiene this problem ? what to check ?

Please share if any of you have wiring diagram for Radiator fans.