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Hello, thanks for posting
There's no doubt in my mind that the battery was connected backwards, it's the only thing that will blow fuses while doing so, relays and components are protected pretty well by the fuses so it's not a relay there are more fuses out.
Now a couple of questions:
when turning the key on do the dash lights turn on and do the headlights work?
Does the engine start up and keep running?
Do you have something to check voltage with, a test light or voltmeter?
Hello, I'm just following up to see if the problem was solved, please let me know if you have any additiona lquestions, if not I would very much appreciate a positive rating and close this post.i