Hi, I have a 1967 John Deere 4020 diesel that's been converted to a 12 volt negative ground system in the past. I just got the tractor about a month ago. I've noticed some lights not working and I went to replace the light switch ( p/n ar28401 ). I was in a hurry and I didn't ID each wire before I took them off of the old switch. The old switch had 7 spades on it and the new one has only 6 spades on it. Every picture I've found on the internet has a different marking ID on the back of the switch. Mine does not have a BAT A or BAT B. My switch has these markings on it: R2,HD2,TL,HD1,FL, and another that may be B or not marked at all. I have seven wires from the tractor harness to connect to a 6 spaded switch. I've ordered a JD shop manual for this tractor, but I have a feeling it'll be very bland and not answer my question. I thought about asking Agri services who make harnesses for tractors, but I thought Id give this website a try first. The colors of the wires from the harness are: green, yellow, white, blue, black, brown, and red. the tractor has 4 lights for the fenders. I think that the green goes on the HD2 spade and it has a jumper wire from that connector to I think the spade below the resistor looking thing on the switch. I am very surprised that such a popular tractor doesn't have more info available on the internet. Does anyone know how to connect the harness to this switch?