2008 300 Touring sudden key fob problem!!!
 

Hello I'm new to the forum and any help here would be much appreciated. So my car's key fob was working properly until yesterday when I installed a new radio/amp in my car. I installed my system myself no problems but when I finished I noticed my doors are not locking/unlocking, no panic, no truck action ...nothing. So I immediately switched out the battery in my fob but nothing. Then I got my second fob and nothing. I checked all the fuses in the rear fuse box by the battery...nothing. Checked the fuses in the engine compartment...nothing. I haven't checked the relays yet but aside from that I'm all out of ideas. Hoping someone can help me troubleshoot this. Thanks!

Ok update I checked all fuses and all relays and I found no issues all are working correctly.

Still having troubles? Replacing audio and installing an amp is mighty tricky on these newer mopars. Has the main car battery gone dead also(won't crank)? A possibility of something staying powered on draining the main battery OR the immobiliser has been activated by the anti theft system due to unplugging the OE radio. The steps for that, I am not familiar with for the 300 model.

I thought that this post looked familiar. You posted on the 300C forums too.
This should help you figure out if you knocked a connection loose. It is for 2006, but the wiring should be pretty much the same.
Opening will be faster if it is downloaded, it's just over 200 mb's.
https://app.box.com/s/023nx2u4n7kj5u6ntz3j5q4vksfn0kh3

Holy smokes nice manual thanks! Now how do i use this thing to troubleshoot my problem, it's huge lol.

It will tell you the wire colors you are looking for in the wiring section. Trace the wires and look for damage, or disconnected-loose connections.