3406e no start

Then your not getting any power to your ecm. Check fuses .

Or worse case ecm is done . Its prob some corrosion or blown fuse for ecm power

 

You have to find out for sure if you got power and grounds at the ecm plug.

If that all checks out then your ecm is done.

I still think your missing something.

Check for power at the ecm pins in the plug.

 

Did you check in the batt box ?
A lot times main ecm wires and fuses are in there.

 

The fuse/relay they have mentioned on here is inside the driver side frame rail before the starter. But has a reset button, but I don't think you would have any lights or power period. But check and clean the connections when and if you find it. Mine had loose connection and it would drop the voltage the more accessories I would turn on, finally one day it left me on an on ramp, everything turn off, everything. It it reseted itself (as a breaker) and I got all power back. When I got back to the yard, a mechanic mentioned the problem and I cleaned the connections and never had an issue agreed.

 

I think diesel Dave is talking about the main breaker, I've had that problem too but that shuts off all power to the truck. No power anywhere until it self resets when it cools down. There is a fuse for the ecm somewhere, I know there is, just have to find it.

 

I know it's a power to ecm problem because you say you have no check engine light when you turn the key on. If the check engine light doesn't come on then you have no ecm power, the ecm is the only thing that can turn the light on.