Could have just been a bad relay, have you tried getting a replacement from Warn?
Also upon further inspection this looks like an internal relay for the winch. I believe they run two for in and two for out but correct me if I am wrong. I believe this is what you need...
We originally wanted a 2 door but just didn't give us enough space for 2 dogs and our stuff to travel. Still love it. The 2.7 has some decent get up power. Very excited to take her off-road.
That is also my plan to mount at least the remote head on the dash via accessory rail. Bronco is going to be a shared vehicle with the wife so I have to be somewhat considerate lol