My project 4710's electrical wiring is driving me crazy. Brief background - I bought a sight unseen 4710 by bidding online at an equipment sale. I don't know the history, but apparently the tractor was used for spraying a corrosive liquid fertilizer. Until now I have sorted out everything with just a lot of sweat and muscle with the only mechanical issue found being a stripped drive-line coupling. I am now trying to replace the work lights. Oddly the hot wire is reading between 6 to 7 volts with no switched power. Also discovered another pair of wires to a non-OEM rocker switch that with the switch removed have 13+ volts (battery voltage) on one wire and 6 to 7 volts on the other wire. Both the work light wires and the mystery switch wires have been interwoven into the wiring harness so I haven't yet been able to find the other ends. The fuse panel is melted at the F6 fuse and the wires snipped off in the back. There is a free swinging relay with multiple wires added near the fuse panel with at least one wire snipped from a homemade "Y" and with power supplied directly from the key switch. If you disconnect this relay the fuel solenoid will not work; nor will it work if you remove the factory relay or the fuel controller module. There are another pair of added wires with a 20 amp fuse between them; haven't check these yet, but logic would say they are for the melted F6 fuse holder. The headlights work in the field position but not the road position - maybe this is because I have removed the tail light bulbs as they came on after washing the tractor and would not go off; the flasher bulbs are burned out. There is no relay in place for the manifold heater although all of the wiring appears to be there. I think I can sort out the fuse panel but I have not a clue as to where the 6 to 7 volts would be coming - unless the fertilizer has turned the tractor into a big battery. Help!!! Please. Almost forgot, the turn signal switch is almost impossible to move so I presume it is badly corroded. It will be replaced once I get the steering wheel off.