Dumb mistake 07 Expedition Completely dead

[Nightsun]

I'm in San antonio, tx. The truck is stuck at my friends ranch in rock springs tx about 150 miles nw.

 

[Nightsun]

Ok went back out there today. Hooked up my scanner tool and it couldn't read Ecu. I'm thinking Ecu may be bad. Can someone tell me what needs to be done if I swap out ecu's with a known good one. Do I have to program the Ecu or keys? Please any help is appreciated.

 

[Mediamonkey11]

Did you check the fuse for the reader's ability to get pwoer? not sure which it is...

 

[tonydiv]

All those thins that you said still work, door locks, etc., are controlled by the GEM (generic electronic module). So it sounds like the GEM is still ok. Is your code reader self powered or does it use power from the truck? I'm trying to find out if there is power to the diagnostic port.

 

[69Hcode]

OBD power should be same as cigarette lighter

 

[stamp11127]

GEMs are only on the first gens.

The DLC is protected by fuse F20 (15a) in the smart junction box on your 2007. Check that fuse with a test light or meter. You should have 12v on both sides of the fuse at all times.

I would expect programming the ecu to the instrument cluster so that they are a "married" pair. Otherwise you will not start.

 

[Nightsun]

Thanks fellas. Got the truck back last Friday. Turned out the fusible links between the generator and starter motor we burnt up. Replaced them and it fired up and has been running like nothing ever happened. Lesson learned... Thanks for the help. I appreciate it.