I just installed my factory brake controller. It was an easy install but somewhat frustrating.
An hour is reasonable if you have small flexible arms for installing the bracket.
I spent an hour and a half trying to get those self tapping bracket screws in place.
I ended up drilling out the mounting holes and used nuts and bolts, had it installed in under 15 minutes.
I have a GDE tune and was concerned about flashing the ECM to activate the controller.
My great service manager only charged me 60.00 to flash and preserved my GDE tune.
His tech plugged in my spare stock PCM/ECM to flash the brake controller sales code which activates the unit.
Then he replugged in my GDE tuned PCM/ECM and all is good.
I had installed a Tekonsha P3 brake controller (probably the best aftermarket controller available) and a plug and play Ram wire harness but didn't like it hanging under the dash and was an occasional knee knocker.
Here ia a good video for installing the factory unit. Worth watching before you decide.
https://www.youtube.com/watch?v=9QwNAbd_R0Y#t=1116.0689032
Here are the install instructions.
http://moparonlineparts.com/docs/82215040.pdf
__________________