2002 CHRYSLER LHS Electrical System Problems

I PURCHASED A CHRYSLER PACIFICA BRAND NEW WITH IN THE FIRST 6 MONTHS THE THING DIED OUT WHILE DRIVING DOWN THE PARKING LOT EVERYTHING LOCKED UP AND I WAS UNABLE TO STEER BUT I STOPPED BY PUTTING ON THE EMERGENCY BRAKE !! THEN THE NEXT THING IS MY HEADLIGHT AND BRAKELIGHTS KEEP GOING OUT. I PUT NEW BULBS IN AND IN A DAY OR TWO THEY ARE OUT AGAIN, I HAVE PUT IN SHOP. THEY SAID THEY CAN'T FIND ANYTHING WRONG BUT NOW IT IS WORSE. I CAN ADJUST THE SEATS MIRRORS AND THE WINDOWS WORK BUT SEEMS LIKE WHEN RADIO IS OFF NO HEATING FAN BLOWING R DON'T AT ALL TOO !!!! I BOUGHT THE VEHICLE BACK TO THE DEALER AND WAS INFORMED THE WARRANTY HAS EXPIRED AND TO DIAGNOSE IT WILL BE $550. I SAID,"NO I HAVE EXTENDED WARRANTY AND IT IS COVERED", I HAVE HAD PROBLEMS WITH...