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Just a follow up. I ended up ordering from Scotty 4 gauge wires, HD FR Switch, and an HD Solenoid. Installed it all, and everything is back to normal. Getting about 24 MPH. Attached is the old FR switch after I removed the C-clip. The heat was causing some serious damage. Now after a long drive, I no longer smell something burning when pulling it in garage. Thanks everyone for your help.