My truck is completely dead if the ecm is dead how would you now

 

You would know the ECM is dead if it had a hole from a .44 Magnum in it.

No, seriously.

 

check battery voltage. check voltage to a power accessory like the cigarette lighter fuse. if you have power to these two then check power to and out of the fuse for the ecm. also check power to the ecm itself with the key on. plug in a scanner to the obd2 port.

 

No power to obc2 port to scan for codes

 

Check the cigarette lighter fuse under the hood

 

I've checked every fuse i haven't found a burnt one yet i check under the hood and in the dash board

 

My initials are ecm, am I dead?

 

Do you have 12v to the cig lighter fuse?

 

No 12volts everything is dead

 

Is your battery dead too? The cig lighter doesn't run from the ecm I believe, so you either have a dead battery, bad ground, broken positive wire or loose or bad connections at the battery or somewhere else