Could be a short in the wiring harness/connectors somewhere that caused the blown fuse. But also check for open circuit and ground connections.
It could be the Front Control Module (FCM) or the Body Control Module (BCM). Earlier Chargers have the FCM and later Chargers have the BCM. The FCM/BCM control exterior lighting (e.g. stop, turn signal and tail lamps, etc...). If you plug a OBD2/CAN scanner that can read all codes (not just powertrain codes) into the car's OBD2 port there may be some diagnostic codes logged. If you have the FCM (it's mounted on the front side of the engine compartment fuse box) you can inspect the condition of the wires/connectors attached to the FCM. The BCM (if your car has one) is mounted under the dash on the passenger side.
From time to time there's postings on this forum asking about engine modifications or engine rebuilds. There's a couple of books that go through the details of answering these questions.
I have a 2006 charger rt I’m wondering if an engine from a 2005 Chrysler 300c would work for my car... found one for a dirt cheap price running perfect still in car but not sure if it will work PLEASE HELPPPPP
I need to replace the radiator in my sons 2007 with a 3.5 v6 Auto zone says there are 2 different potions depending on 1 fan or duel fans but when I do a parts search on line I am not seeing a difference am I missing something or are they trying to up sell me Thanks