Ok so I have a 02 f250 v10 4x4, 85k miles. Truck has always ran great, I am driving down the my road yesterday, I came to the stop light and the truck cut off. I started it back up, started fine, but check gage light was on, trans temp guage not working, engine temp guage not working, tach not working, O/D light is blinking, check engine light on, passenger window would go down and not back up, so I turned around to head home, the truck was shifting a little erratic ( never had any problems ever with trans ), the truck seemed to be misfiring some, the only guages that seemed to be working were the speedo and fuel gauge. I got home, pulled out my scanner, plugged it in, waited it came up saying error. the scanner has always worked on the truck in the past. I checked all fuses and relays, everything is good. ANY IDEAS?? thanks for the help ahead of time, a couple of my local ford buddys are saying pcm is bad??

 

Was it raining, or had it rained in the last 24 hours?

Steve S.
To many to list

 

No it had rained days before this happened, but not that day or the day.

 

I can only think of one thing to cause them all at once. The ground. double check all of the grounds and maybe add some more.

 

You dont believe the pcm could have took a dump? All the grounds were in excellent shape?

 

I would check the wires in the column coming from the o.d switch. These tend to chafe on the steering column and cause all kinds of crazy stuff. Pop the plastic covers off and take a look.

 

It sounds very similar to when my windshield was leaking and the fuse box/GEM module was getting wet. I had no window functions, the only guage that worked was the speedo, truck stopped charging, tranny acted up, OD light flashing, ect. I had to replace the fuse box under the dash and all was good. That and fix the windshield leak.

Steve S.
To many to list.

 

how do you test to check if the fuse box or gem module is anygood?
how can i test that power is coming into the pcm/ fuse box/ or gem module?

 

Bad battery/alternator/voltage regulator?

 

Yeah, check your battery voltage.