Longboard_757

I bought my 01' sport back in January and it had an aftermarket radio, caused no problems, but I changed the radio back to my own Pioneer aftermarket radio and still had no problem. Recently i've felt like going back to a stock radio head (already have all stock speakers), and picked up a working stock radio and plugged it in. Works!

But there are two small problems...

1- every so often i "think" that the volume changes itself only slightly, just enough of a change to notice

2- Turning off the jeep, there is a click out of a fuse in the glove box, everything works and theres no problems with power or anything, but i took the radio out and put my aftermarket radio back in and the clicking stopped.

Any ideas as to what could cause it?