what will happen if a fuse box is wet? | Yahoo Answers Apr 06, 2009Best Answer: Underhood fuse boxes have a water resistant cover that will repell splashes of water. If the whole fuse box is immersed in water, you may pop several fuses. Sometimes water vapor may condense in the fuse box, but this is probably not enough water to cause a fuse to pop due to a short circuit.Status: OpenAnswers: 4Underhood fuse boxes have a water resistant cover that will repell splashes of water. If the whole fuse box is immersed in water, you may pop sever..Best answer · 0I saw a movie once where Tokyo blew up because a fusebox got wet. Maybe it was Godzilla that got wet now that I think about it. Seriously, better d..0depends on how wet it is if its soaked it could short out if its damp probaly nothing try to dry it with a hair dryer or someting0ummmm..i'm not sure but proly it might short out.0 What Happens With Water Damage in a Car? | It Still Runs The caps connecting the spark plugs can have water contaminate them as well. The head and tail lights have to be checked for any leakage, drained and dried to prevent electrical shorts. The fuse box can short out, as can the onboard computer of the powertrain control module (PCM)--depending on the model car.