I'll add this link for those that are new to this thread. I've put this web page together which covers using the Kool-Vue heated towing mirrors on all of the '94 - '06 Rams. It has a summary of information from many posts from several mirror threads, and shows how to wire the '94 - '97 trucks.
Dodge Ram - Towing Mirror Upgrade Information- '94 to '06
This talks about getting the reinforcement brackets from Dodge although I see that places like Fenderworld now source them.
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Charlie Smith
'97 2500 EC 4x4 auto, Goerend TC/VB,
Enterprise Eng pump, 16.5*, KDP, Arrowcraft DRW,
Aerotanks D60 tank., Rancho 9000's, Air-Lift
'96 3500 EC 2x4 auto,
Goerend TC/VB, #5 plate, 16*, DDP2,
355 Hp / 970, KDP, Ride-Rite