My girlfriend recently bought a 97 Toyota Tercel. It came with a Kenwood KDC-217s HU and for some reason only the front left speaker is working. I checked the wiring, fuse etc. behind the HU and it seems to be allright, but I must be missing something. Also, the speakers are JBL's which I assume are after market aswell but I'm not sure. I'm pretty sure that the speakers aren't blown, they don't crack or pop or anything so it must just be a wiring problem. Could you please offer some trouble shooting advice. My AV knowledge is fairly sound but not so much when it comes to car stereos. Any help would be greatly appreciated. Thanks, Jack