zacmtz7 said:
I do have a police package, but I have spliced into the horn so don't need a module, thanks though.
Where did you splice in? On the Charger with that Whelen siren, you must splice in at the horns under the hood and NOT at the steering column. Whelen sirens use positive polarity for horn ring activation, so you must tie in after the relay, and not before it, or use an EVModules adapter.
There are 3 fuse boxes on the police package model, one in the trunk next to the battery as MPD818 stated, one under the hood on the passenger side in front of the strut tower and one under the passenger side foot well attached to the filler panel under the glovebox.