Have a 98 cherokee that keeps blowing radio and gauges fuse. The fuse blows instantly when put in. It has an after market radio, but that has been in for years. I have removed the radio and had the same result with the fuse. Where do I start? Anything that commonly happens to look for.

 

Check it with a DMM to see what kind of power is going to them, might be a bigger problem than you think

 

power going into the fuse box looks ok. Cant really check anywhere else in the circut bucause the fuse blows instantly.