HI I have a 2000 Yukon xl that I just recently modified adding more alternators and replacing the the wire from the alt to the red junction box. I got everything all hooked up and secured started the truck and it ran , but I noticed as it ran the wire I upgraded ( from the alt to the red box ) began to heat up and melt so I shut the truck off and disconnected the battery. Can anybody tell me what would cause the wire to heat up and melt ? Im open to all suggestions and input thank you in advance.