My 05 has a different trailer wiring harness than my former 02. I suspect that I'll have to rewire my boat trailer to accommodate the new harness. Has anyone done this? It looks to be fairly simple, but...

Any advice offered is appreciated.
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"Thus says the LORD,
'What injustice did your fathers find in Me, that they went far from Me, and walked after emptiness and became empty."
Jer.2:5