[68c20lwb]

Hello, there is a metal box with 4 or so plugs and a plug with a resistor looking thing attached to the core support on the inside driver side. Below the washer fluid container. I THINK it is wired into the headlight wire harness? Well I started my truck right now after my 454 transplant and I started smoking from the backside. I shut it off and put my finger behind it and it burned it (stupid I know) it stops smoking when the truck is off. I took it off the core support and opened it up and I do see burn marks on one of the contacts inside. How do I fix and or replace this? Thanks folks!!
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