Car was running, I stopped it to check my box. When I tried to start it again, it would not start. Radio works, interior, exterior and dash lights work but are very dim. Any suggestions? When I try to turn the key to start the engine, there is some movement but the cranking power begins to fade quickly. Any suggestions?

Replace instrument cluster or remove and check for cold solder joint on Circuit Board. https://www.6ya.com/callphilipforhelp

check the fly wheel censor ,clean or replace it , i had the same fault in a jag ,and it was the censor,usually held on with just one bolt or hex screw.

It seems that the battery is incapable of holding a charge. You might try disconnecting the battery cables and try charging the battery again over night. Reconnect and see if anything works - if nothing works - it's time for a new battery.

To start, a fuse. The radio receives a signal or feed from the interior lights so that it will dim or brighten with the interior and dash lights. during the radio installation it may be that this wire was left off and not insulated, or used as a power lead, etc.

Start by checking your fuses, the interior dash lights and exterior marker lights are on the same fuse, so start by finding a burned fuse, replace it with same size, and then do this: Without turning the key on at all, try your lights and see if they work... if they do not, and the fuse blows immediately, that wire is shorted to ground, either touching a metal part of the inner dash or hard-wired incorrectly to the radio. It may be that it was mistaken as a ground wire during the change-out.

If after replacing the fuse, the lights come on, then turn the radio on and see if it blows. Whether it does nor not, the first place to check is the last place changes were made. If you return to check the wiring to the radio and cannot find the problem, disconnect the radio entirely, turn the lights on with a good fuse in place, then reconnect the wires one by one, keeping an eye on the lights, when they go off (fuse blows), that is the wire that is either mis-assigned or can be left off. Most newer radios are all led and it is not necessary to send a signal to it from the lights. Good Luck!

Check your battery terminals , are they clean and tight ? Next try to jump start your car. It may be that you have a bad battery.

If your car's overheating, make sure you have enough coolant in the system. While you're under the hood look for disconnected wires near dash then check your fuse box for broken fuses. Please check your coolant, little to no coolant = a new engine ~$5000!

it is your body control module. . did not mix it up with the computer. the bcm runs every thing inside the car locks/radio/mirrors /etc.. in your car it is part of the fuse box under the dash

Assuming you have checked all fuses, the next step would be to locate central grounding points (there may be several) and remove and clean battery terminals and the remote ends of the cables at their attachment points.Locating some of these may be easier with a manual covering the electrical system of the car:
Sebring manual
When removing battery cables, always start with the negative cable first and reattaching it last.

if the problem is that the interior light does not work, and have already checked the fucibles and appear well or not, housed the correct fuse. Just disconnect the battery cable and connect buelbelo .. and you will be surprised to see that your lights funcionana. I do not believe it but I worked it costs nothing to test.

you have short between the radio and the interior light.
you need to get a diagram of the electric system and trace it out.
if you pull the fuse for the interior light, and run the CD what happen?