Being that this is football season, I'm throwing in a challenge flag....
WRT: "I have a 2005 Diplomat...changing from 4 pin to 6 pin tow cable. I had 12V power in the center recepticle....."
My 6-pin connector has no constant-ON DC voltage. And a 4-pin connector typically carries L & R brake/turn signaling (2 pins), tail light voltage (1 pin) and ground (1 pin).
So what am I missing here in this discussion?
Robi & Dale ---- Go Navy ----
2016 Winnie TOUR 42'
Tow: '08 Buick Lucerne