I tore into the PCM to fix the "no tail light" issue the other weekend. While in there I cleaned up various pins of corrosion and noticed a few questionable traces.
I jumped the tail light trace and got them to work again, but yesterday (after about a week of working fine), the truck quit on me and will not start now Cranks over, but no start. I'm suspecting the PCM, as I was just in there and it looked a little rough. There's no codes, no blown fuses and the truck ran as usual prior to yesterday.

Can someone id the pins/wires and connector that control the fuel side? How do I test them to confirm there's no signal coming out of the PCM....and bend over and order a new box?

 

Man, you must have some serious knards to tear into the PCM. I'm not worthy to even post on this thread. BUT, I would like to ask if you had researched the Modulite option instead? And my $.02 on your fuel problem- I'd start with the fuel pump, which are known to go bad on these trucks (well, all trucks actually). It may not even be PCM related.

 

haha, t'was nothing really A great pictorial of the fix over on dodgetalk, made it easy.
I got the lights working fine and it also fixed my powerlocks issue where none of the doors would lock/unlock with the button.... but now it looks like I have bigger problems
Trace leading up to pin J11 on the board is the one that looks like it exploded at one point (see my pic). That one leads to power outlet-console fuse, so I can see why it looked like it did. It shares a lead with other traces though, and I just can't track them down to any of the connectors on the back of the box. It might be something as silly as a loose pin in the connector itself...question is which one(s) control the fuel delivery.

 

just to update this thread The PCM is still runnin' great, the no start issue was a bad injection pump
https://www.dieseltruckresource.com/...s-t307926.html