is the fuse labeled suction type fan.and how do you know its blown.I have the low coolant light keeps coming on I think the fan isn`t working .I`ve read it might be the fuse is blown or fan is not working.

 

The radiator fan fuse is in the little box with the flip up lid just in front of the battery.
2 ways to test :
1. measure the voltage on the end of the fuse NOT connected to the battery buss bar, you should see 12.7 volts or better.
2. disconnect the negative battery cable, then remove the fuse and measure it with an ohm meter. You should see 0 ohms or thereabouts.

NOTE: this fuse supplies power to the Fan Control Module mounted on the left fender well.
This module is controlled by the PTCM to regulate the fan speed.

 

That circuit is kinda cool...

As Alax said, the fuse provides power to the Fan Control Module (FCM). The FCM then supplies power to the fan motor, under command of the Power Train Control Module (PTCM or PCM),

It works like this:

There is a single wire running from the PTCM to the FCM. This wire has 12 volts on it, the PTCM pulls this wire to ground in a series of pulses, the WIDER the pulses, the faster the FCM makes the fan run. (It does this by sending pulses of 12 volts to the fan motor, your meter will show 4 to 12 volts, but that's because your meter is averaging the pulses - DC motors are not usually run on low voltage for low speed, they are run on NORMAL voltage that is pulsed to get the right speed). Periodically, the FCM also pulls the line to ground - this tells the PTCM that the FCM is still working. The PTCM turns the light on if it does not see the pulses coming back from the FCM.

Also, if the FCM does not see the pulses from the PTCM, it assumes something is wrong (which is the case) and that the engine's temperature is unknown (which is also true) so the FCM turns the fan on all the way. If the light is on and the fan is running full speed, there is a communication breakdown between the modules.

If the light is on and the fan is not working, then the big fuse to the FCM is blown OR the FCM is bad. (I do not think the FCM can sense a bad fan motor.)
You can always unplug the fan motor from the FCM, the connector is clipped to the radiator support on the driver's side - use wires with the end stripped off and see if you can jumper the fan motor directly to the battery. If the motor turns, the FCM is bad. If the motor does NOT turn, the motor is bad.

But I'm pretty sure you have a bad FCM or blown fuse, given your story here....

 

Thanks Marc, I erroneously said ECM while I, of course, meant PTCM

( I corrected my post )

George ( ALAXfire )

 

But isn't the PTCM kinda the same as the ECM?

That is to say - the Powertrain Control Module in a Crossfire does the same job(s) that the thing called the Engine Control Module does in other cars?
I guess we DO have to be careful with terms, tho. Don't wnat someone trying to find the ECM in the service manual !

 

I think you are right.
We have a BCM, PTCM and RCM in that under hood box, right ?

 

Yes and I THINK splice block 100 and/or 102 is in there, as well.

And the TCM (Transmission Control module) in an auto is somewhere near the shift, the TCM (Top Control Module - convertibles) is back in the (driver's side?) fender.
The SKREEM is in the dash behind the gauges.
No sure where the "Pulse Module" for the starter is.

What other control modules are there?

 

ok I tried moving fan it was stiff like it was stuck .I moved it spun it a couple of time.so I started car up let it get hot,but no fan.stopped car and motor on fan spun ok by hand ,turned car back on with the air on fan comes on spins fine.I shut off air conditioner fan stopped.so is it the fan or the fan relay?

 

Sounds like a bad fan motor to me.

Remember, you need not let the car warm up, just turn the A/C on and the fan runs at low speed. ALWAYS.

 

He did turn on the AC and the fan switched on.
OP why start another thread, if you start another thread every time you add info people will not bother to answer as all the replies will be spread around.

 

I wondered by the Opening Post seems like it was missing something...

 

Cool. I can reward myself with an alcoholic libation. I learned something already today!

Thanks, Calzonedude!

Oh, BTW-I set my own rules. Old age has its benefits.

 

sorry to all those I offended by opening a new tread.i`m just trying to understand my problem.and thanks to all those who have taken the time to help me

 

By opening a new thread, you DO make it hard for us to help AND for those who come along later searching for the answer to the same question(s) you asked!

MAX: Have two. One for learning something. And one for admitting you learned something from an internet forum!

 

OMG. I didn't think of that.

I believe I NEED 2 now!

 

Your two threads have been merged into one right here.

 

No offense taken but it is hard to see what is going on when two threads have the same question and in some cases different answers in them.

People tend to give up when they answer in one post and then find that the thread has been abandoned by the OP who only watches the other post. They do not bother to repeat themselves.

Keep the questions accurate and complete in as many details as possible. Not like some who basically say "My car will not start, what's wrong?" They tend to get ignored.

 

I received a new fan tonight and I`m gonna remove tomorrow.what is the proper way to remove the clips holdingit in without breaking them?

 

I am 700 miles from my car, I'd go out and look - but can't.

I removed mine when I put the new oil pressure sensor in, just cant' remember ...

 

well I got the clips off they just slide up.I got the fan in and it works. But when I took the old one out I broke the nipple to the coolant tank.I suggest removing the coolant hose altogether to any one that has to remove their coolant fan.Thanks again to all those who helped me.