I am trying to locate the ECM on my 2003 ford expedition, can someone point me in the right direction? thanks

 

Not positive on the expedition, but if its gas, it should be mounted on the LH (driver's) side rear of the engine compartment. Diesel, LH fenderwell.

 

It is located on the passenger side firewall. There are 3 wiring connectors going to it. Ford manual does not show option for diesel in that year.

 

I hope he lets us know where it really is !

 

That unit is on the drivers side firewall underneath the brake booster its in between the engine and cabin On the fire wall

This is not my truck but about the same place

http://www.ford-trucks.com/forums/89...d-removal.html

 

Here is the picture for the 2003 Expedition PCM from the Ford Factory manual. At least I know where it is now. He let us know hanky.

 

In reply to your PM, The ECM is basiclly the same as the PCM. Same part, different name. The ECM is known as the Electronic Control Module, Engine Control Module or Emission Control Module. Ford calls the same thing the PCM, Powertrain Control Module.
Ford has a Generic Control Module (GEM) close to the location you described. It is located behind the fuse panel under the dash. Go to the following site. It is the Ford parts site and shows where the parts are.
Buy 2003 Ford Expedition Parts | FordParts.com

 

Thanks, way 2 old !
I checked with a 2003 Ford Excursion/ Superduty wiring manual (Ford) and that was why I said I couldn't be positive about the Expedition, but I'm pretty sure that by this time we know everything in the manuals is not 100 per cent accurate.

I took one look at the pix where the gentleman showed approx where the ECM was located and my first thought was, Gosh he really didn't have to go through all that trouble to find it. Had a good laugh.

 

Create an account there and use it for research. You can also go to www.fleet.ford.com and use the VIN decoder with VIN and know what the vehicle is. Problem is it just goes back a few years. You can also download owners manuals there.