On another thread Myself and Roland (mueckster) were trying to figure out what was wrong with my A/C. I thought I would start my own thread !! It seems that the compressor isn't going on at all ! IIRC it makes a click sound when it kicks in and out ! Mine is silent ! No clicks ! I've checked The 10amp fuse in position F2.10 A/C clutch relay, A/C clutch solenoid

Is there any other fuses in this system ????? I have no power at the compressor and I've checked connections that go backwards from that...... no power that I can find anywhere in the line ! Does the power come from the compressor to the a/c or does the power come from the truck to the compressor ????? Does that make sense ???? I'm almost at the point where I'm going to take it to someone that knows about a/c SH*& !

 

Hope that worked.. didn't upload like normal !




Nope it didn't !

 

I'm loading my Ford dvd right now. When I find the a/c wiring diagram, I will post it for you.

 

Hope this helps.

e3o~us~en~file=e3oen057.pdf~gen~ref.pdf

e3o~us~en~file=e3oen054.pdf~gen~ref.pdf

 

Thanks Roland. I may need those some day.

Reppy no worky.

 

Well, without reading the links, I would surmise that power comes from the truck to the compressor and tells it to run. There is an air gap, but before checking all that it will never engage if you are out of a proper charge of refrigerant and oil.

 

Those links are for an '03. I have another for my '01. I think the wiring diagram is slightly different. Here's the one for the '01. According to my Chilton manual '99 thru '01 is the same. They changed in '02.
e1o~us~en~file=e1o05413.pdf~gen~ref.pdf

 

If Russ is testing both sides of the pressure switches, he should be at least getting some kinda power on one side at the clutch cycling switch even if the a/c sytem was discharged.
It's a little harder for me to diagnose from "long distance". I can't see what's going on.

 

Agreed. We are simply guessing here as he has not posted about the health of his system. A simple cheap **** charge from a can from Wally will oft times get the systm running again.

 

Got that one too Roland. Covers my year.

 

Hey guys ! Sorry I haven't posted to your answers ! busier than a one arm paper hanger ! Sooooo.... I will test the other fuse that I see in the system ! I don't think the charge has anything to do with that plug having no power ! I must have power to that plug at the compressor to make it cycle ?? True ??? If you guys think I should go get it recharged, I'll do that ! I just think it's a power problem ! Roland you are correct ! Very hard to fix from Texas.... but do know that I appreciate your time and help very much ! As well as you Mike & Robin !

Bare with me guys... I don't know every switch and wire in these trucks and where they are located ! Maybe this one is out of my league ! But it shouldn't be !

 

Basicly, what Mike is saying that low pressure in the system will keep the clutch cycling switch from closing and sending power to activate the a/c clutch. This switch acts as the "low pressure" switch. Checking the power "to" and "from" this switch will tell you if there is a problem there.

 

The only place I could find power is at the fan ! If I unplug the fan motor it shuts off ! Maybe I'll get it recharged first like mike says ! Maybe its not sending power anywhere because it has no charge left in it ! I'll keep you guys posted ! I'm off to work today and I leave tomorrow for a trip across BC and back ! About 28 hrs in the saddle with no A/C hahaha !! Thanks for the help guys !

 

Just buy a cheap can of refrigerant recharge with the hose and gauge. You will then be able to eliminate the charge with that. Wally and most of the parts stores sells them. Good luck.

 

You only need about 30 psi to close the CC pressure switch. System would be almost empty to open this switch. There would still be power going into this switch. You can remove one of the a/c line charge port caps and depress the schrader valve to see if it has pressure.