In my 94 Z28, automatic trans, power windows and locks, I was in a cemetery and I hit a concrete block against the front lower subframe underneath just on the front corner of the subframe in front of the rack, going maybe....1 mile an hour. I was barely rolling. Once I did that, I no longer had functioning windows and no power lock functionality. After replacing the window fuse, I had functioning power locks, but when I tried to operate the windows, the fuse would blow. This happend once. Then the 2nd time, same thing, nothing, only a half hour later, after I thought the fuse blew again, the windows began to operate, as did the power locks. So far so good. What gives? I'm concerned I haven't seen the last of this ghost,lol. Anyone seen this before?

 

ohhh boy,,, lol, sounds like a ground got knocked lose or a wire harness maybe.

 

I did bang it pretty good, but not enough to do any physical damage...but something got banged around. I wouldn't know where any such grounds might be. I'll look in my shop manuals. I hope its not a harness issue. Oh no!!!

 

if your blowin a fuse you must have a pinched wire or lose wire gounding. going to need to try and find the wire that is grounding. can be a very time consuming thing to do.

 

Was gonna start with checking for a loose ground wire. Then on to finding the short.

 

My recomendation would be to check the point of impact first. In this case under the nose of your car. See if you can see where it scraped and what it scraped. Like Craby said, you are looking for an exposed wire.

 

I found the issue nice I tore down the dash. Checked for proper continuity on the circuit line that I was having an issue with. Turns out, it was a botched wiring job from someone in here previously. Found it quick, which was nice. Thanks for all ur input.