Remote Start fuse/module? Electrical Gremlins.

[m1dn]

Well the truck drove fine today, but it's also warmer today and everything started melting, so we will see i guess

 

[m1dn]

Im back!
So the weather dropped into negative celsius ( 10-20 freedom units ) tonight.
And the issue is back, the battery was drained at 4am.
Replaced with a spare battery and off i went.

Noticed when battery is deadish, all electronics still work but it wont talk to ECM and scanner cant reach ECM either.
I wonder if ECM has crappy connection somewhere and freezes/drains battery?

This seem to happen only in very cold weather so I can’t even test whats draining it properly during warmer day or in garage.
And im definitely not going to poke around in freezing weather outside, I’d rather just keep spare battery nearby lol