Switch Stuck
Not the same problem you had, but mine melted the wiring right behind the switch, which then shorted out the wires, blowing the fuse. I just check the wiring behind the switch. However, I'm surprised it didn't blow the fuse, but it could have melted through the wires.
I think the 40 amp fuse is pretty heavy duty, allowing the wires to get real hot before taking the fuse. To me it would appear the black foam/insulation Keystone uses also allows it to hold the heat in, making the wires real hot before blowing he fuse.
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Ed & Mary
2017 Cougar 333MKS
2015 RAM 3500 HD with 6.4L
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