Question won't start -- which battery do I use to jumpstart?

[JLDickmon]

After it rained heavily yesterday I noticed the truck was trying to turn over without keys in ignition. I got in and immediately started it (w/keys). I let it run a couple minutes and when I tried restarting it was completely dead.

Holy Crap!
have a couple buddies help you push it under cover and get out the fans.. dry that rascal out, inside & out..

something got wet and shorted out..

 

[nativedave]

Replaced starter solenoid, rewired connection to ignition, juiced up battery.....started right up! The journey continues.

 

[BIG JOE]

Replaced starter solenoid, rewired connection to ignition, juiced up battery.....started right up! The journey continues.

Well thats good news