PDad...we were both off a little.
Trying to supply the best info. so out comes the book.
From the 97 FSM
While in low speed operation the circuit supplies the right side cooling fan motor, the left side cooling fan motor is supplied a feed through a resistor causing it to run at low speed. When high speed operation is commanded the right side fan continues to run at low speed, but circuit B supplies a feed directly to the left side cooling fan motor causing it to run at high speed.
PCM commands low speed fans operation when the following conditions are met:
- Vehicle speed is less than 58 mph
- Engine coolant temperature is above 100 C / 212 F
- Vehicle speed is less than 40 mph
- Intake air temp is above 9 C / 48 F
- A/C refrigerant pressure is greater than 190 psi
High speed is commanded when the following conditions are met:
- Vehicle speed is less than 65 mph
- Engine coolant is above 108 C / 226 F
- Vehicle speed is less than 50 mph
- A/C refrigerant pressure is above 260 psi
So basically from the book even if you are over 226 F your fans shut off once you reach 65 mph. Which makes sense because at that point you are most likely getting more airflow from speed then the fans can deliver.