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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...

Thanks guys for the info , I got it all sorted out. Ended up being a bit of a learning curve to all the buttons on the light controller.

Im having a similar problem with my lmtv, what relay did you switch out?

Ok I will check that tomorrow. can someone tell me exactly what the Master battery switch on dash is supposed to do because mine dosent seem to do anything? I can change the idle, disengage the fan, check the dash panel but no other switches have power. I want to check if there is a relay to...

I didn't have a volt meter today but will check the relays at battery box tomorrow. do you have a picture or diagram on how to exactly check the relays so I can identify what is 12v and 24v? The LBCD box, is that accessible when the spare tire is lowered? I did notice a box with cooling fins on...

Yes I have the printed broad and the lights are illuminated for both 24v and 12v power.

Hey everyone, I'm a new member and have been watching this forum for years wishing to own a LMTV and I have finally made my purchase and trying to get it running properly on the island of Puerto Rico. As the title says I have a 2003 M1078A1 3126 Cat LMTV, I just got a new ECU back that had to be...