Cooling fans coool fans willnot work if plugged in to cool temp sen

A pontiac montana ? There are three relay's that control your cooling fans ! unplug what sensor ? The engine coolant temp. sensor is an input to the PCM - engine computer . When temp. reaches 213 degrees the PCM energizes the relays , depending on low or high speed . Using a scan tool to see if the PCM will turn on the fans an checking engine coolant temp.data is the right way to diagnose this . Relay Driven Dual Cooling Fan Diagnostics

The headlamps/wipers are most likely the multifunction switch, on the steering column side. This is a combination switch for the wipers and headlamps. The removal of steering wheel/airbag need to be accomplished. This should be performed by a professional.
There are 2 cooling fans, you need to verify which one, there is a large connector to fan, verify if you are getting power at the fan motor to determine what is the faulty unit. They are relativly easy to change, the fan and motor will come out as an assembly. .

have you bothered to check the thermal fan switch...

If the fan comes on only after you push it, then this indicates a worn or faulty motor within the fan unit.
Replace the fan.

You might have changed the wrong sensor. There are two. The cooling fan sensor will be closer to the radiator, either plugged into the radiator or the thermostat housing. One sensor is for the temp gauge and the other is for the cooling fan, good luck.

They will not come on untill the engine heats up beyond the normal operating temprature.
There is a engine temprature sensor that sends a signal to a relay for the fans.
The temp sensor could be bad , or the relay. The fans will not normally be running while you are driving , because the air flow caused by the vehicle moving is sufficient to cool the rad enough.
If you were to come to a stop in traffic , the fans might not come on for a minute or two. That is Normal.

there is a coolant fan relay, check make sure is good if no you might have a broken wire.

I am assuming you are meaning cooling fan. Your cooling fan is operated by your vehicle computer, via a coolant temp sensor. Not coolant temp sender!!! The sender goes to your light or gauge. The sensor goes to the PCM, which operates your cooling fan. The first thing to do is check your fan to see if it works. Unplug fan and wire two wires, one to one side of fan plug in, one to the other side of plug, one goes to positive battery terminal, one wire to negative. If fan comes on, you have a bad sensor or relay. If fan does not come on, replace fan.

okay pull the temp sensor connector ( disconnect it) and turn car on if the fans run then its the temp sensor.... part # wt3000.
Theres also 3 relays that turn the fans on in the fuse box cooling mode fan relay @15 which is part number 7234. and cooling one # 1 which is 3604, and cooling fan #2 which is 7236.
I have the same car...give me a fan clutch cooling system anyway of the week. simple and efective no problems.

if you have had it checked give me the readings of the high and low pressures with the engine running and i can tell you if you have a fan problem ....but it must very accurate info.....vagman54@btinternet.com