97 Ssei Shakes!!!!

I recently purchased a 1997 Bonneville SSEI. Great car!!! :grinno:

Ok, my problem is there is a shaking on the right front side. I bought 4 new tires , had them in for balance and rotation 4 times in 4 weeks. I replaced the pads and rotors!!!

WHAT IS IT>>????? My mechanic and the dealer are stumped!! HELP!! :banghead:

P.S. Just tonite the info center on the dash says I have a rear tailamp out. I checked, every possible brake light, tail light, signal light, and back up and parking lamps all work. What's going on?????????

Half Shafts? Tie rod ends?

check the drive axles like he said there not to exp. to replace