AC and No Start Issue

[elusiveprey]

Hi all. I have a 2004 Eddie Bauer 4.6L. I just took my family on a vacation in Florida. Before we left I had no issues with it. While driving down there, the AC cut out. It still blows, but not cold air. I though it was the compressor, and decided to look at it when I got back home. Well 5 days later, we headed back home and the truck performed great (minus the AC). I left it idling in the drive way when I got home (last night) and it cut off. I have not been able to get it to start since. It does crank, just won't turn over. It almost sounds like the fuel pump, but I am now wondering if it could be connected to the AC going out somehow. A quick Google search says that some Ford models have a constant control relay module that controls the AC and Fuel Pump, but I can't find a definite answer as to whether the expedition has one of these. Does anyone know? Perhaps it is just the fuel pump and these two issues are not related. Thanks in advance for any advice.

 

[elusiveprey]

Also, not sure if it matters...but for full disclosure: About 2 weeks ago, the car would not start. It ended up being the ignition fuse. I replaced it and had no problems cranking it the past two weeks...until now

 

[stamp11127]

According to the service manual for your year the only thing common between the fuel pump and the a/c is the pcm. I would check the following fuses for the a/c in the Central Junction Box: F1.13, F1.116, F1.5, F1.33, F1.11, F31.4

PCM fuses: F1.5, F1.34, F1.28
PCM Power Relay

Do you have a test light? If not I would suggest picking one up since they are a very handy tool for quick checks of electrical systems.

The no start condition test would be to check fuel pressure with key on. On my 1st gen the pressure should be 35-45psi (I think). Don't think the other gens are any different. If the pump failed or isn't getting power you will not have any pressure on the rail.

What is your wrench turning experience? The members that add to this thread will tailor the responses accordingly. If you don't have the factory service manual I would suggest getting a digital one off ebay. There are quite a few modules for this and that on your expy.

 

[elusiveprey]

Thanks for the response. I do not have a test light, but I can pick one up and test those.

 

[stamp11127]

Some of the fuses are hot at all times while others are hot on run. I test in the run position to make it quicker. Test both sides of the fuse, usually the left side of the fuse is hot.

 

[elusiveprey]

Wanted to let everyone know I figure it out and it was actually quite stupid. I had taken the cover off the fuse box to look at the AC problem and forgot to close it all the way. My wife accidentally kicked the Fuel Pump relay on the fuse box and it came out a little bit. I noticed it was sticking out a bit and was able to press it in. It cranked right up. The AC still doesn't work, but that's another issue. Glad it was something small, as I was close to towing it to a shop

 

[stamp11127]

You still need to check fuses on the a/c and get the pressures. If you can't get the compressor to cycle on, just the static pressure is a good start. We will need to know the outside temp when you get it.