Hey there, my name is Matt, and I have a 95 XJ Sport.
I have a similar issue. My Headlights stopped working - but intermittantly. When they stopped working the first time, they would come on and off whenever they wanted. Then they would come on when I moved the multi-function switch. Now they are on, but extremely dim - almost off. When I flick onto high beam - one gets brighter, but not even to low beam brightness - the other doesnt change.
I found the wiring harness behind the drivers side headlight to be full of corrosion, so I cleaned that all out, and it didnt help. I have replaced the headlight (on/off) switch in the dash board, but it has not made any change. Should I replace my multi-function switch next, or install the headlight harness upgrade?