2003 Range Rover burnt wiring

I have a 2003 Range Rover HST with 73250 miles. One day the instrument panel smoked and all the gauges including the lcd went out. The turn signals worked but it did not indicate it in the instrument cluster. I took out the instuments and found the black/white wire connector burnt from the S3 connector. Also, there are two pins out of the cluster that have no wires connected to them also melted the plastic in their position. I have the DVD on maintenance and repair, but I can't find the S3 connector or the black/white wire in the schematic, so I have no idea of where to go. I need help! This is a note to Dave H. Thanks for the reply. This Rover is here in Hawaii. It originally came from Las Vegas. There are three multi pin connectors in back of the instrument cluster S2, S3, and S4. One is black, the other blue and the burnt one is white. I'm not at the car now so I can't tell you what pin# it is. One day the fuel pump went out, I replaced it and the fuel pump relay. Since then, the fuel gauge reads only as high as 3/4th full and 1/4th empty. Also, the left rear window regulator fell apart and I replaced it but broke the little door handle light wire, which I did not repair as it was minor to me. I was told to take the cluster apart as one of the gauges was shorting out but trying to seperate the housing from the circuit board is proving difficult. I'll try again today. When the connector burned and fried all three 5 amp instrument fuses, the car was able to start and I ran it home with a warning buzzer on all the time with the key in or out. I thought maybe there was a defect with the fuel sending unit, so I disconnected it, hooked up the connectors, turned the key to on and the connector smoked again! So frustrating. Looking at the DVD electrical diagrams I too did not see any S2, 3, or 4 connector listed nor did I see a black with white tracer wire. Even more frustrating. If I knew where the wire came from, I could disconnect it and try to see if it would blow the fuses again but I don't know where to look. If you can figure this one out, you are a Master Tehnician. I too was a dealership technician and service manager so I'm familiar with repairs of all kinds and not afraid of electrical problems but without knowing the path, I'm lost. I'll be checking on this post to see if you got further than me on where to go next. I really appreciate the help. Mahalo and Aloha, Gasser1