Gary-3165

Hello, Very infomative site. Hope you folks can help. I have a 93 D-350 auto. Had a no start situation, Got that part fixed(2 Ign. switches later). Anyhow, Now I have nothing as far as title says. Tested plug for PCM, have no power there. Kinda lost on what to do from there. Dont want to chase things around if I do not to. Any help would be greatly appreciated. Thanks!

The_Head

PCM controls all those things, I believe.

Gary-3165

To clarify, I tested the PCM plug as per the sticky. I have no power at cavity 3 with key off. Nor do I have power at cavity 9 with key on. So I am assuming something is not letting power to the PCM plug. Dont know too much about electrical on autos. Have fixed 1 fusible link to wire #1 on ignition switch ayesterday when I put the new switch in. Need to know where power comes from for PCM plug. Thanks!

wannadiesel

There's another fusible link that feeds #3. Do you have power on the shutdown solenoid with the key on?>

Gary-3165

Wanna, Yes I do. I pulled the blue wire at the shut-off and had power with the key on. Kinda lost as to why I have no power to PCM plug. Thanks !

wannadiesel

There's a couple harness connectors back past the fuel filter, check them out for possible reasons why you have nothing on #9. #3 is another fusible link, there are a bunch of 'em.

Gary-3165

Thanks for the info! will check them out and let you know. Thanks once again!

Gary-3165

Checked the harness by the fuel filter, didnt find anything out. Ran out of daylight while looking for the fusible link for #3 cavity. any pointers on where the fusible link is for #3 cavity. Harness still has all the factory loom and tape on it. Or do I just need to open the harness up. Thanks once again!

wannadiesel

All the fusible links are in that mess on the fender.

Gary-3165

Update, Found the fusible link that supplied power to PCM plug, patched it back into another feed and Voila! success Dont know why they run it all that way, Guess so when we try to work on things we just want to :. Anyhow, Thanks for all your help. Wanna, you seem to be some kind of 1st Gen Guru!!!! Sorry my 1st post had to be a problem, Hopefully I wont have to ask for too much help in the future. Once again THANKS!!!!

wannadiesel

I have a wiring diagram and I know how to use it.

Glad to hear you got it going.

Gary-3165

You could give me a wiring diagram and I would just be more confused! Lol! As I said I am not that savvy at wiring, but I am learning, (Guess I have too if I keep driving a 1st Gen,) Love my truck but some things they designed leave alot to be desired Thanks again for all your help!!!