The factory radio in my 01 xj only works on rear speakers. I changed to a different stock radio (CD/cassette). Made no difference. Any suggestions?

 

ok. i had sorta same problem? is it hard wired in? or does it have the original harness?

 

Grab a multimeter and check for continuity between the speaker, and the head unit's speaker leads- the wires are prone to breaking in the rubber "boot" between the A pillar and door. If the speakers are good, and two head units exhibit the same problem, I'd suspect the wiring.

 

check the connections at both speakers. it might be a longshot but it is easy to check. and try to check the wires around the doors and the radio harness for broken or frayed wires.