Alright...

ECU (PowerFC w/Commander) and/or Stock ECU won't come online.

Odometer doesn't show up.

Everything else has power...dome lights, radio, headlights, dash lights, windows, etc.

I checked my fuses, my relays, and the ECU ground. I reseated the connections under the UIM. And still no luck.

The car will not start... I was backing up out of a parking lot and the engine just shut off.

I swapped all relays with known good ones, and swapped fuses, main fuse is fine.


I'd like to check all the main wires to the ECU, there are 3 power wires I believe.

1.) Black with white stripe (+12V when Ignition is 'ON')
2.) Blue with red stripe (Constant - for memory storage, always +12V)
3.) Blue with white stripe (Connected to the room fuse)

If this is incorrect let me know. This may be a grounding issue but I do not know where to start.

 

ignition wiring - wire was completely toast behind the ignition switch. Replaced it and it's all good.

 

Sweet ...

 

having same problem, 93 touring , but vehicle runs for about 5 minutes then odometer shuts off and so does car , odometer comes on after about 10 or so minutes then you can start back up and then it wil die again, already replaced ignition switch i guess that doesnt solve the problem , which wires did you have to replace by the ignitoin switch to fix problem and where did you get them , was it a harness or just splice the wires back to gether, please respond thankx