Sounds to me like your multi-funtion switch is bad. This is the switch in the column that works the turn signals. The rear brake lights are feed thru this switch, but the upper light is not. Doesnt sound too hard to change. Here are the instructions.
Disable airbag system.
Tilt column to lowest position and remove tilt lever, if equipped.
Remove ignition lock cylinder.
Remove shroud screws, then remove upper and lower shrouds.
Remove two screws attaching multi-function switch to steering column casting. Disengage switch from casting.
Disconnect two electrical connectors.
Reverse procedure to install, noting the following:
Torque retaining screws to 18-26 in lb.
Activate airbag system.
Wednesday, August 23rd, 2006 AT 5:32 PM