Installed Subs and Amp and now truck has zero power

Gotcha. Now that that I know there is absolutely nothing happening when you turn the key to accessory (or start for that matter) and you have measured 13vdc at the battery, then we can narrow it down tremendously. Since you verified continuity of the wire(s) from the battery to the main fuse/relay box, then I seriously doubt the wiring is the culprit. Also along those lines, If there had been a bad, or at the the minimum degraded ground, then I would expect to have seen some sort of oxidation on the battery terminals. Of course I cannot guarantee this, but I doubt grounding is going to be your culprit. Since you have said that you accidentally connected the remote wire to the antenna wire, and the antenna wire may be in-line with the ignition switch, then I would personally focus my troubleshooting efforts there to confirm point of failure, or even better, to rule it out. Check out this YT video. I know the guy is performing the troubleshooting on a 2000, but I think the steps are relative to your 2011 as well. You will just need to find the locations on your truck that he states in the video. If it were me, the first thing I would check is the 30A fuse he states as AN2 (he may call it AM3....my hearing isn't the best anymore) at the end of the video. That fuse send constant 12vdc to the ignition switch so if it were to be bad, then it would cause the issue it sounds like you are having. Look forward to hearing what you find out.

 

Crap!! My bad....I forgot to past the link to the YT video. Here it is: https://www.youtube.com/watch?v=0jWouSQYTnU&t=198s
Hope this helps.

 

Thanks everyone! I finally figured it out. Everyone kept telling me to check the terminals which I did but I was only looking at where the terminals touch the post. I did not take into consideration that I took out the wire attached to the terminal so I could bolt down the positive wire from the amp. I must have disrupted the connection. I cleaned off all the rust in that area and it instantly got power and started right up.

 

Glad to hear you got it all figured out. I have been there before, where I drove myself crazy trying to fix an electrical problem going down a rabbit hole only to find out the simplest answer was the right one. Again, good job getting it fixed.