I have a 93 Grand Cheerokee and I am having a lot of problems. The doors won't lock if any of them are open and the radio will go off if it goes over 62 on volume. If i turn on the dome lights the radio starts to flash.

Check your fuse box, pull all your fuses especiall one for the interior lights or aux lights. I had a problem with an older car when the one interior light fuse was blown, the interior lights would work when the 4-ways were on. Having a blown fuse can do wierd things to the rest of an electircal system.

As for the stereo it might just be a limitation on the volume, or again, something involving a blown fuse somewhere else.

My guess is you'll find a blown fuse.