Radiator Cooling Fans Not Functioning?

BTW had the tranny rebuilt a week ago. Not sure if this was an issue prior. I remember hearing the cooling fans wine down when I turned the car off before the tranny work.

Engine Cooling problem
1998 Ford Taurus 6 cyl Two Wheel Drive Automatic 155k miles

Ok, I have replaced the coolant res tank due to a leak in one of the seams. I double checked making sure that the fan motor works. The fans both turn on when wired directly from the battery. I checked the relay to make sure it was still functional. I wired from the battery to the relay spot and the fans turned on. But when my car runs hot my fans do not turn on. Could this be a Thermostat problem?

Me and my Electronic professor checked it with a couple different of meters. We determined that the relay was switching when we applied some voltage to it. We had the cap off and could see the relay switching over.

Engine electric cooling fan not working, but don't have owners manuel to check fuse and where located plus the relay.

The car dash temp gauge goes to Hot if I drive slowly/stop with the AC on. If driving at higher speeds (40mph+), AC air blows cold and temp gauge range is normal.

Yesterday I drove the car about 20 miles without the AC on and had no problems. I turned the AC on for about the last 4 miles of the trip and slowed my driving. The car temp gauge went from mid range to Hot after a few miles of slower driving and the AC started to blow warmer air. I turned the AC off and drove until the temp range went back to normal mid-gauge. I parked the car for the night.

This morning, I topped off the anti-freeze and then started the car and let it idle for about 5 minutes. The top radiator hose was warm after a few minutes of running at idle. Next I turned on the AC and let it run - it blew cold air for less than a minute and then the air turned warm. I noticed the electric cooling fans did NOT switch on when I turned on the AC. I continued to let the car idle and periodically turned the AC off and on. The cooling fans never came on. I turned the engine off and I check the Cooling Fan fuse which is mounted on a plastic box with other fuses in the engine compartment just above the radiator. It looked fine and I even replaced it with a like fuse from the fuse box, restarted the car and turned on the AC. The fans still did not switch on.

To ensure I wasn't expect the fans to turn on in error, I started my Honda and turned the AC on. It also has electric cooling fans and they both came on when the AC was turned on and they both shut off when I turned the AC off.

So, it seems like the cooling fans may be the issue but the fuse in the engine compartment was OK. Is there another fuse or relay that I should check? Thanks!

I replaced the CCRM this evening and that was the problem. AC works fine at low driving speeds and the cooling fans came on when the AC was turned on. Thanks!