98 Limited Sluggish Power Locks & Fuse Issues
 

I just bought my first 4runner, 98 Limitted, and love it! But the fuse for the power locks, windows, etc blew out after two weeks. I found an extra one in the glove box so I'm assuming this has happed to the previous owner. The only thing I can associate it with is after the 4R sat in the sun for a while, it's black so gets really hot!

The next part of the problem is after messing with the fuse the power locks are sluggish. They work for about four lock/unlocks then feel like they lose power and locks only go half way up/down. I was thinking the fuse might be due to a short somewhere in the lock system but I really don't know much about it and the wires all seem to be in xcellent shape.

Anyone have any ideas? Is there a relay for the locks somwhere or a ground that could be causing the problem? Any ideas would be much appreciated.