I have a 97 cherokee with dim lights any suggestions as to what would cause this,and how to fix the issue.

 

Clean battery posts and make sure there tight also check the ground to the frame over time this may become old and even might need to be change. Lets know if this does the trick.

 

Have the same problem with our `00. Daughter tried new headlights, no change. I am going to take the head lights out and pull the harness out as far as I can. Splice into the ground wire(black) and feed it back into the engine compartment. I noticed a bolt on both sides that goes into the rad support. Going to back them off and put the added ground wire under them.