Question about 2003 Pontiac Sunfire

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Cooling fan Quit working. Fuse is good and I swapped identical heater blower relay so it's good too. What's my next step.

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Check the resistor pack situated next to the blower motor

Posted on Sep 12, 2009

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Posted on Jan 02, 2017

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97 transport 3.4 engine- New radiator, thermostat,temperature sensor, water pump and new low coolant level sensor. Temperature guage goes to 260 degrees but engine does not over heat. Bled air from cooling...


Check the operation of the cooling fans at the radiator. While idling disconnect the coolant temp sensor at the top left (drivers side) of the engine. It will be a 2 wire connector near the thermostat housing. When disconnected the coolant fans should come on immediately, if not you have an electrical issue with the relays or blown fuse. Check the fuses first in the underhood electrical panel. Next swap the cooling fan relay with an identical one next to it, if the fan works the relay is open.

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Cooling fan does not shut off. removed wire from battery


It sounds like the cooling fan relay is stuck closed. It'll be found under the hood in an electrical fuse panel. Find it and swap with a similar one next to it (use the Air conditioning clutch relay or the abs relay, not the main or starter relay) restart the vehicle and recheck. If fan works normal reinstall swapped relays and get new fan relay.

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1997 Dodge ram 2500 deisel. Blower fan wont come on. replaced climate control module and fuse is ok. Is there an inline fuse or relay I'm missing?


if the fuse is ok your next step is to see if you have power at the heater fan switch,if you do then the next thing is the heater blower motor resister it is under the heater assembly,that is what gives you different speeds,
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The engine is overheating and the fan doesn't appear to be operating but turns freely by hand. Is there a test point or sensor location?


This is the easiest way to test. Unplug the fan and direct wire to the battery and see if it comes on. If the fan comes on it is good, go to the relay center and make sure the relay is good. There should be another relay right next to it that is identical to it swap the two out and see if it comes on then when it gets hot. If it does and the item in which you swapped the relay from does not work then relay is bad replace it. Also check the cooling temperature sensor mounted near the thermostat housing if this goes out the fan will not kick on.

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2001 buick lesabre. my heater and a/c blower is not working


I believed the a/c blower is a relay activated. So no fuse getting blown to make it to go bad. Try to locate such relay (the ID label is found inside the relay cover assembly). Swap it with an identical one before making a trip to auto part store.

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Temperature sensor problem?


There are 2 different circuit that control the cooling fans.
The engine controller turns the low speed fan circuit on to control temperature and turns on the high speed fan circuit if the engine and A/C is running.
It sounds like your low speed fan function is not working.
Find your fan 1 fuse located in the under hood fuse panel and make sure it is not blown. If OK go to next step.
Find your fan 1 relay located in the under hood fuse panel. Find another relay in the fuse panel that matches and swap the two. If the fan then works you know you have a bad relay.
If both are check good, let me know and we will go from there.
Below, I have attached the wiring diagram for your cooling system, hope it helps.
Regards,
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check the "blower motor fuse" "heater fuse" and ac fuse and relay. these will be located under the dash on the drivers side usually mounted near the foot rest next to the door AND under the hood along the fender on the passenger side.

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