My fuse went out too. I now disconnect my boat trailer lights before backing into the water. So far this has worked for me. Someone else mentioned that their wiring harness near the muffler had been burned when the muffler fell off and he drove it like that for a while. My muffler also fell off and had to have it re-welded. That part of the harness runs right along the exhaust on the frame. Check for burned or brittle wiring near the muffler.
Or it could just be a bad IPDM shorting out the fuse. The IPDM contain the faulty recalled ECM relays.
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