I have an '05 EX with 100000 miles. I was having starting issues so I tested the FICM. 28.4 volts at idle so I ordered a new one from swamps. The new one came and I have no power to the FICM.
I don't know how to test the big fuses so I switched #304(FICM) with #305(trailer power) and it made no difference. There was a little chaffing on the center FICM plug so I checked the wires and re-taped them. One battery was weak so both have been replaced. I have been working through the no-start list in the tech folder but got hung up on the no-power issue at the FICM. Is there another fuse or relay that I can check for the FICM? I did have 2 codes come up just before I cahnged the FICM. One was for low power on injector #5 and the other was low turbo boost. I erased the codes to see if they would come up again. I won't do that again.

 

Do you have a wiring diagram for the FICM and PCM? There are a number of different fuses and relays that take power to the FICM and PCM via multiple points. Not only the main power fuses, the big ones, but the smaller ones that power the relay coils will need tested. I could post my wiring diagrams, but the fuse numbers would be meaningless since mine is a different year.

You test the fuses by removing them and testing continuity with a meter.

 

I rechecked all the fuses and found that #103 was blown. It's a 50 amp for the FICM/ignition. I will replace it tomorrow and see if that fixes the problem. Thanks for the help.

 

Thanks DCHAMBERLAIN for the response. The blown fuse was the problem. Truck is running and the new FICM tests out great.

Dave

 

You might consider tossing an extra 50amp into your glove box just in case.

 

I now it's been a while, but I just found this thread. I'm having the same problem for the same year and model truck. Do you have a diagram?

 

xaviers65 towrds the back of the owners manual is a diagram of the fuse/relay boxes.
If you do not have one you can get it from the dealer or download from ford for free, you just need to give them your vin#.

 

This is for 2006 but I believe they are the same. FICM is IDM (injector driver module)


^^^----under hood fuse panel


^^^^----under dash fuse panel

 

Can you send me a picture diagram I have no power to my ficm. I replaced the batteries, egr, and ficm. I have zero power to the ficm

 

That’s all the pictures I have. Relay 304 switches power to the FICM, fuse 18 powers the relay. 2003-2004 are different fuse box lay out, I think 2005-2007 are similar if not the same as the 2006 in the pictures.