On the switch, "road" lights up 5 of your six lights on the cab, taillights and flashers, "field" lights up those same 5 plus grain tank and unloading auger light. The switch on your steering column turns on your "high" beam headlight which is your sixth light on top of cab. I believe it's the fourth light from the left sitting in seat. It's quite possible you just have a bad connection from the wires especially on the flashers and taillights. When harvesting at night th lights don't shine very much on the auger of your header, so I added 2 more lights on the bottom corner of my cab angled to each end of the header.
It's quite possible your reel speed switch and automatic reel speed will not work. If this is the case there is a way to adjust the speed on the solenoid on side of feeder house.