Whoops... What could I have done?

Hi All - I'm not sure how to troubleshoot this one, but I could use some of you smart people here!

I was wiring some simple LED's to the bed of my 2016 Offroad, I've done this plenty of times with no issues. I played around with a few fuse taps until i found what i wanted. But now, the truck won't start! It was trying and trying, but never turned over.

So, i backed out all of my changes, inspected the fuses very well. Everything looks good and is seated fine. All extra wiring has been removed. It still won't start. It cranks and sounds fine, but never goes. I tried jumping it for S's and G's, but no luck. Any ideas where to start? Trying not to get it towed!

 

Did you disconnect the battery while doing this?

 

Probe the top of the fuses with a test light you got a bad one somewhere

 

I ran the wires OVER the fuel tank and into the cab through the rubber grommet on the bottom of the cab. I didn't use any sort of force while doing this, i just fished the wire.
Any easy way to ensure my fuel pump is functioning?

Edit - you made me think to double check where i ran through the firewall - i used a metal coathanger. I noticed one small wire down there that looks kinda nicked, however, it's totally still in tact. it just looks like a small amount of insulation got nicked on it

 

Nope

 

Great idea - I just tested ALL the fuses in the main fuse box under the hood and under the dash on the driver side. Every single one looks good.

 

Try disconnecting the battery, wait a minute or two and try again.

 

This morning i let it sit for about 20 minutes unplugged with the same results. I'm letting it sit longer now while i briainstorm

 

What’s the security light doing when the ignition is on?

 

Poop! Hope nothing went wrong with the dang computer! These trucks can’t turn on the turn signals without going through the computer! Good luck

 

Nothing - it flashes red when the key is removed from the ignition

I'm working on getting a video of me trying to start it uploaded - will post soon.

 

Video of attempted start
https://youtu.be/9rBDyU-RyUg

 

Part Out!

 

Did you check the fuses under the hood too ?

 

Affirm - I ran my multimeter over every one of them exposed in the fusebox under the hood.

 

And under the dash ?

 

Yeah your ECU is probably fried.

when I had a failed attempt at flashing to the TSB tune, it cranked the same way.

 

Yep

I noticed there are no lights on my dash - how can i confirm this? what do i do?

 

no lights as far as check engine?