99 f250 7.3 powerstroke

Cranked it once, relocated it, and then it wouldn’t start when I changed my clothing. When I insert my key and turn on this top left fuse, it starts to buzz and tick. After I take it out, it continues to tick and buzz.

I should note that even though I accidentally switched the positions of the battery terminals on the passenger side last night, creating a large sparky mess and several arc marks, the car started and ran perfectly today.

After removing the fuse, the noise stopped. Did I damage my fuse panel?

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Yes. I am thinking that a lot of stuff melted. worked for a while before the soder became chilly and withered.

Beyond that, I am not much assistance, but I personally have a 99 7.3. Please let me know if there is anything you need verified.

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How many things really count as “a lot”? :smiling_face_with_tear:

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That doesn’t really matter, or at least I couldn’t say for sure.

You will need to check every fuse and relay.

I am just a backyard mechanic, so I don’t have a professional method for checking everything. I would assume nothing worked after the reverse polarity incident and go from there. Definitely Google around, but I would start by checking all the fuses, links, and anything else that might have been fried. There could even be a fuse inside a chip, but I am not certain. Google is your friend here.

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my fuses are fine, one of my relays is buzzing and ticking… think its that one

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Does the OD light come on randomly, or only after it’s rained?

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I power washed it about an hour before that.

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In the early 99? Mine is precisely the same. Your hood valve or windshield probably leaks as well, am I correct?

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We are dealing with the same issue. I will share my findings here later if I figure it out. I know another guy with an '99 who has the same problem as us. We’ll get this sorted.

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Leak water or fail to start when wet?

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Examine your gem module by opening it up and examining the chip for any fry marks.

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Your gem module is located in the black box that sits on top of the fuse box, behind it. Depending on the trim, it has one, two, or three plugs connected to it.