After disconnecting the battery multiple accessories stopped working

See that's the thing I was having all types of troubles with the security system and the remote start so I uninstalled them, and I probably shouldn't have but they looked to be aftermarket to me. There is no corrosion under the tip of him I've had it disconnected and reconnected many, many times I've been going through and cleaning all my connectors and everything right now I'm in the process of putting it all back together again but last time I put it together as soon as I connected the horn blue constantly. And I got rid of the no bus but pretty much every other light was on and no crank no start sometimes when I put the key in and try to start it there's no lights at all on the dash like no power whatsoever so I'm hoping I'm doing this right.

Also, I'm pretty sure it's the SXT because of the trim on it.

I don't have scanning tool I plan on getting one soon I've been doing this all on researching and diagnosing.

Pics.

It looked aftermarket to me it was spliced into the factory harness. The problem started by me wanting to check fuses because the horn wasn't working once I got fuses in and the horn worked and I reconnect the battery the horn went nuts and the rear windshield wipers squirted and sounded like something else was turning on also I don't know if it was the fuel pump or anything I don't know but I'm at the point now where I need to start reconnecting everything I've gone through pretty much every inch of wire in the vehicle now I need to put it back together and put the battery in and I'll be able to tell you what happens when I put the key in but this is just a mess and no this is my personal vehicle. Me and my girl have been struggling for months trying to get this taken care of she's been riding scooters to work every day it's just a mess. Before this happened, we had no problems it runs great there's only a hundred and twenty thousand miles on it. Hope I didn't mess something up, but I've replaced all the grounds and stuff, so we'll see what happens when I reconnect everything it's raining here today but I don't even care I think I'm just going to go ahead and get everything connected back up rain or shine and get this done and taking care of. Thank you for all your information I will let you know as soon as possible what's going on once I have everything connected up again.

Another thing that I might want to add so that you know, the reason that I started checking all this stuff anyways is because her stupid ex-husband took the wheel well protectors out and left them out, so it went through an entire winter and summer all the rain all the snow all the sand and salt flying up all those holes right into the engine bay. He messed it up and that's why I was up in there cleaning everything out and then I discovered all the grounds that were just rotted. Literally just piles of rust even the ones inside because of all the stuff that was spilled I removed the carpet cleaned it dried it everything like I have pretty much restored this Nitro.

It's possible but no. All the fuses were good but yes, the horn one was out because of how it kept blowing when battery connected. The issue I'm chasing is the fact that my truck will not start when everything is hooked back up. I cleaned connectors and everything. I'm working on it as we speak, I'll let you know exactly what's happening when I'm back to the point where I put the key in and see what happens.

Thank you. No, it was not cranking over. At all. For a bit throughout messing with wiggling wires and tapping TIPM and inspecting wires, sometimes when reconnecting battery I get all lights on cluster. Check engine and air bag and the lightning bolt. I believe the red dot too. We're going to find out soon here. I've got just about everything connected and put back in, etc. There are one or harnesses. Like, the plug parts that come together, that I cannot figure out where I disconnected them from, very ashamed of myself for not taking pictures to keep track or something, because I'm lost. So now that's my last issue before even attempting to connect my battery. I want to make sure I've got all connections connected in the. Right spot. Is there any way to do this? Are there diagrams or anything I can refer to and understand, lol. Pictures. Anything. Haha. I can send you pics of the pieces I am referring to after I get this message finished. As for the fuses that I had removed for horn a while ago, I'll take a picture of the 2 10amp fuses it was. As of now, all fuses and relays that are supposed to be there are there all in working condition I believe, and all should be good to go with that. I see some light in my future here, I hope. Hearing about how long she's been without her car gets to me after a while, hahaha. But at the same time, I do understand. It has been difficult to say the least. Alright I'm going to get to the pic taking now. Thank you so much for your help thus far it is much appreciated believe me. She just paid this vehicle off and know that I've done the restoring and everything else to it in the meantime, she needs to keep it and let me keep upgrading etc, after we get it to start again of course. Then we got winter coming. We need the 4-wheel drive for sure and it handles pretty darn good in the snow for me. Thanks again.
Talk soon.
Matthew

Also, I might add. That's what started all of this. The vehicle did run with the fuses for horn out. For quite a long time and it wasn't until I disconnected and added them back again because inspection is coming nearer, and I wanted the horn to work. It wasn't until that that this problem started, and it has been difficult ever since. That's when I started tearing everything apart. Found the bad grounds all over etc, etc, etc, lol.

Also, yes. If that is the case, I did not know they were stock I thought, they were aftermarket remote start and security. Uninstalled both because the remote start stopped working a long time ago and I was frustrated. I probably messed everything up. Ugh. Great. I thought there were ways to just lock it manually and stuff and the way it was spliced in, and it was more recent electrical tape than the rest and everything. I feel like an idiot.

The one that I can't figure out is if you're standing in front if the truck looking to left and runs under air filter box and runs into the firewall into the vehicle. I'm going to go take. Another look but still let me know what you can. I'm going to go dive in. Whatever modules on the inside have been removed also remember. And wiring all the way to factory harness. Cut close as possible and taped up. I have the modules, but I threw the harnesses that were attached away. :(

What if I purchase and install an aftermarket one if that's what the issue is? I mean this was happening even before they were removed so I don't see how that was the issue. My head's spinning here. Thanks for the help.

Guess that is still have that in Stones. I did not remove that I pictured when I removed, and I took a picture of the thing you were asking about, and all those wires are present and connected.