Since the taillights dashlights and turn signals are all on seperate circuits and don't even share the same fuse I would suspect that you have some damaged wires inside the steering column that are shorting. To repair this you will have to remove the steering wheel including the airbag system. This requires a degre of skill as well as special tools,air bags can be dangerous if you don't know what you are doing you could get hurt. http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/15/70/30/0900823d80157030.jsp
Here is a link that shows you how to get the steering wheel off,then you'll have to find the electrical problem. If you have the tools and the confidence,you should be able to narrow down the problem once you get into the column.
Edited by enginboy on February 2 2005 at 7:33 PM