Go to this page http://www.geocities.com/zgarage2001/z.html and look at the "Z problems". The fusebox is a common site for corrosion. I had one fuse box melt down on me. My experience was this: I would notice the lights being out. I checked the fuse visually, and it looked fine. I pulled it and checked continuity which failed. I replaced the fuse a couple of more times. One time while the lights were still working, I lifted the cover to see the fuse glowing orange, not the best thing to see in your fusebox. Eventually, the fuse heated up enough to melt the plastic. I replaced the fusebox and haven't had a problem since. If you want to get fancy, you can get an updated fuse box from MSA for $200. It looks sweet.