Ford Forums banner

1 - 7 of 7 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter #1
I'm having an over heat issue. it's because my fan will not come on until it's way to hot. fan comes on when ac is turned on. so I have power to fan. unplug what I'm calling the temperature switch and it goes to high speed fan. is 5here 2 coolant temp switches. where it turns fan on at low speed then another switch that turns it on at high speed.

thanks Doug
 

·
Registered
Joined
·
6 Posts
It looks like you should have two fans. The AC/condenser fan is one speed and runs when the AC is on. The engine cooling fan is two speed and is PCM controlled by the coolant sensor. The one wire connection coolant sensor changes resistance with temperature change for off/low/high fan speed. The PCM runs two relays (low and high speed) to provide high current for the fan.
 

·
Registered
Joined
·
4 Posts
Discussion Starter #3
it's one fan setup, the fan motor is shunted for the 2 speeds. 2 relays. It has a 1 wire connector for gauge and a thermoswitch next to it with 2 wires.
 

·
Registered
Joined
·
6 Posts
For your interest I am providing the wiring diagrams that show all the connections for your 2.0 Auto Trans cooling fans. Yes, I see your 1 fan is used both for AC and engine cooling.
You have the relays and the engine coolant sensor to check. Plus wiring and connectors, then pray the PCM is OK.

33-1 ECF.jpg
33-3 ECF.jpg
54-3 ACH.jpg
60-1 IC.jpg
23-5 EEC.jpg
 

·
Super Moderator
Joined
·
19,303 Posts
I think it may be the same as Mazda 626 , If it was mine , I would check the wiring / plug and if o.k , replace sensor . Make sure you get the correct one for an automatic as something rings a bell about them being different from manual box . Possible it may have been changed before and wrong one fitted ? There used to have the temp stamped on a lot of them at one time or were colour coded.

51419
 

·
Registered
Joined
·
4 Posts
Discussion Starter #7
ty for the replies, I'm actually in auto tech program at a local com. college. I'm pretty sure it's the sensor, I'm trying to prove it. I have a resister box I am going to use today. using these parameters.
51433
20191011_011246.jpg
 
1 - 7 of 7 Posts
Top