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ok thanks for that info. i have that strap on the alt so I'm sure all is good. I'm going to check for shorts tomorrow just to verify nothing is causing a draw when all power is off.

My first ecm I belive had a battery loss of power which caused failure. my second ecm had the same but also the mother board was fried possibly from water when i washed the engine but the truck did run after. now its only injectors "short" they said this is a new file from the previous computer...

Has anyone had this issue before or know the cause so I can try to prevent it in the future?

UPDATE!... I finally was able to get the truck scanned today and its showing "Short" on all 6 injectors. All other parameters are reading perfect on the truck so my mechanic believes the ECM is bad, so I removed and will be sending to Diesel ECM exchange on Monday for them to inspect and repair.

I saw that video last night and considering it just dont want to spend that kind of money but may have too.

No I don't have access to another ECM. Being in Puerto Rico I have limited resources. I just may have to bite the bullet and pay to have it scanned.

Thanks for the info, I have called my local cat dealer in Puerto Rico but they want 8 hours @ $125 to trouble shoot. I was thinking the ECM could have an issue as this is my second one from Diesel ECM Exchange. The first unit only lasted a week and they said a coil and capacitor went bad inside...

Hey Guys, So I got a LMTV M1078A1 with Cat3126. the truck was running perfectly then I washed it and when parked after running fine for 30+ minutes I disconnected the battery and went to start 4 days later and the ECM was gone. I got the ECM repaired and put back in the truck and now it will not...