There are 2 common problems in 99 fuse panels which cause high resistance and therefore voltage drop. The first of these is that in some (but I don't think all) the terminal on the bottom of the panel is connected to the fuse holder on the top of the panel with a rivet through the plastic. As the years go by and things go through hot/cold cycles, the rivets start to lose their tension, corrosion creeps in, etc. You can resolve this by drilling out the rivets and replacing them with machine screws/nuts if you can find an appropriate size. You might still have to retighten the nuts every few years.
The second problem is that the wires coming from the harness plug onto spade terminals on the bottom of the fuse panel. Over the years, the female terminals go through temperature cycles and also start to lose their grip, corrosion creeps in, etc. Tightening the female terminals (ie: squeezing them with pliers) is typically only effective for a short time - you really need to replace the terminals to have a long term fix for this one.
posted by 198.208.15...
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