Headlights seem to be dim - 1994 Jeep Grand Cherokee

If you had the wrong fuse, the fuse would blow.
Chances are its a bad connection somewhere, like the dimmer switch. You could test the power and ground at each headlight to verify.

It sure sounds like a bad ground Doug.

You may have a loose or corroded headlight ground to the body, the ground wires are in most GM attached to the body near the headlight under the hood. Check all the grounds you can see on the inside of the fender, tighten and clean the with a wire brush, also check the headlight connector for problems like corrosion or not fully seated to the headlight bulb.

The DRL module is bad.

check ground wires.

Well, if you truly believe they are dim, voltage drop test on the power side of the headlight circuit, and then on the ground side. Separately. If there is excessive voltage drop in the wiring, that would cause dim headlights.

If the headlights and dash are dim when u turn multiple electrical items on, then it is a bad Electrical Load Detector(ELD)

Good Luck

What module are you referring to?
Sounds like your multi function switch is bad. Headlights, high-low, TS all the same switch.

Check at the headlight sockets for a bad ground.

add some driving lights or re aim your high beams lower so you can use them all the time.

The only thing that all of your problems have in common is the light switch and the dash wiring harness. The stereo is linked to the light switch because of it's illumination feature' You need to test the light switch with a test light by probing the wires at it's plug.