Dome Brake Light fuse blowing

Start by looking in your service manual to determine "what all" is on that fuse

You can download them free at MyMopar

I'd pull the back seat and inspect where the harness goes under the seat, inspect the rear trunk area harness for damage.

If you "really really" can't find this, there was a tool you could buy called a "short finder." Essentially it is a circuit breaker that you use to replace the fuse. It has a magnetic meter that you move along the harness. The short area will show a reading on the meter from the magnetic field

An intermittent like this might be difficult