Hi John,
For your 2014 Chrysler 300S I recommend the Tekonsha Prodigy P3 Trailer Brake Controller # 90195. The P3 is the industry favorite when it comes to features and reliability. There isn't a plug-in style wire harness so you will have to do some splicing in order to install the P3. The universal wire harness provided will need to be wired in the following manner:
Black - 12v power with inline fuse
White - Ground
Blue - Brake output on 7-way
Red - Cold side of the brake light switch... view full answer...
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