The input is the low pressure cycling switch.
Testimonial: "Which relay controls the fan when the AC is turned on? THe one in the TIPM or the bigger one near the drivers side headlight? What's the purpose of the rad fan shroud mounted thing? Just controlling the fan on low speed?"
SOURCE: engine block coolant drain plug location
They are on the side of the engine block, there will either be a pipe plug or a sensor in the threaded hole(s)
SOURCE: overheating and losing coolant but no leaks
sounds like you have a head gasket problem, no too uncommon on these vans.
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: 2001 grand caravan
the code p1491 is a bad radiator fan control relay.
Code p0403 is an egr valve circuit malfunction.Probably the egr solenoid, have it checked.
SOURCE: 1997 dodge neon. replaced coolant temperature
1997 Plymouth Neon, have replaced radiator, radiation cap, thermostate and hoses, still run hot. Fans do not seem to come on, where is the temperature sensor on this vehicle?
206 views
Usually answered in minutes!
×