Fqn continues to run until battary dies unless i unplug the relay or unhook the battary
Sounds like it could be a relay.
With everything plugged in and the fans running with the key off remove the cooling fan 1 fuse. Do they stop?
If they do not stop remove the cooling fan 2 fuse. Do they stop?
I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa
SOURCE: cooling fan not working
The fans only run when the engine reaches approxminatly 235 degrees F. on the guage that is near the end of scale just before guage show "HOT" I don't think you have a problem, allot of folks out there don't know about this.
SOURCE: 95 grand am radiator fan only runs with AC on
Cooling Fan Temp Sensor is the First thing You Check (with what you have described) Cooling Fan Should ALways come On When The A/C is turned On as A/C Adds A Load to Engine, If Temp Sensor is Faulty it Will Not Give GROUND Signal to ECM >For COOLING FAN >RELAY to Give ground and turn ON The Fan.
There ARE 2 temp Sensors that Serve Different Purposes 1 is for Dash READING GAGE & Or TEMP LIGHT the Other is For ECM or Fan Relay (SAME Thing) you Said>""can disconnect the sensor and fan continues to run" < This Leads me to think you Changed the Wrong One. Not Questioning your Skills Just Here to Help.
TEMP SENSOR FOR 3.1L V6 is Located upper RH rear of engine compartment, near exhaust system. Temp SENSOR for 2.3L Engine is Located in LH rear of engine compartment.
I Hope this Helps Lead you to a NON-OVERHEATING Pontiac.
Good Luck and Have A Great Evening. rejakwilson
SOURCE: Radiator Fan's Run All The Time
There are 2 things that will cause this to happen. 1. The thermostat needs to be replaced and, 2. The coolant sensor can be bad. When I had this problem, I changed them both at the same time, she been just fine since then. Also, I had the check engine light on, and got the code from AutoZone (it's free!)
SOURCE: 2003 Pontiac Grand Prix SE 6 Cyl - Cooling Fan Not Operating
the fan motor could just be bad, you can test this by removing the fan and connecting a wire to each terminal and to a battery. the wires hooked up one way will spin the fan and the other way will spin the fan backwards so you cant hook it up wrong. I hope that helps you out!
SOURCE: rough idle, can't rev, unplug map sensor it runs
GO 2 AUTO ZONE AND HAVE THEM SCAN UR SYSTEM THIS SERVICE IS FREE, SOUNDS LIKE U HAVE BAD MAP SENSOR
If you need further help, I’m available over the phone at https://www.6ya.com/expert/michael_00678fd4800d19c5
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