no start

[catt1173]

been having issue with my truck since got cold checked got good batt,good oil press starts and runs fine after it warms up thought ficm had 48 v went down while cranking took off brought inside warmed it up ,put back on ran fine ,next morning same no start ,help

[Banshee34]

I'm not sure about the 6.0.....

[dannyboy950]

You may Have a bad cell/s in your batteries or a continual voltage draw. Have both batteries load tested individually. If they both pass you will need to do a volt/amp draw test.

[catt1173]

both batteries tested good ,new starter,dont know why if i warm ficm up it starts