Most likely cooked the wiring. I'm an electrician but these things are really simple to rewire. These things don't ground through the frame like you commonly find but had a ground wire run throughout. The chinese wiring on these are sub par quality at best and don't take much to burn up. They soldered everything and cold solder joints are also really common.
That is for a common fully optioned out buggy, there are some different ones so it might not be correct but it's a start. I suggest either loading it in ms paint or something similar and removing the systems/wires you don't have to make it simpler. Even easier is just print it out and white out the systems/wires you don't have. Mine was very basic (only headlights) and I added everything but blinkers. Frankly I think blinkers on these are just an un-needed load I don't need since I can't make it road legal anyways. I'd rather have my extra lighting and winch.
When I rewired mine I went with 12 awg (the factory is chinese 14 that is more like 16). I also upped the battery cables to 8 gauge. After I done it I found the buggy cranks alot easier and my lights are a tiny bit brighter. Frankly even if I bought a brand new buggy off the showroom I think knowing what I know I would rewire it before I even broke it in.
These are the best sources of factory colored wiring I've found
for tracers
https://www.sherco-auto.com/striped-...cdc3b52a77f2c1
for solid
http://www.genuinedealz.com/marine-w...ire?length=113
You might shop around and find it cheaper but I didn't at the time I redone mine