In addition to the above symptoms, the RPM's would increase 200-300 without a corresponding increase in speed. This condition occured in or out of "cruise" mode and frequently when car was cold. Cold weather seemed to make it worse. However, at times, after a warm up the cruise worked fine.
Frustrated, I took car to my shop. They discovered that the wire harness connected to the trans speed control sensor had corroded. They replaced wire harness and speed sensor. Works fine now.
Hope this helps those who were looking to replace the brake light switch. Perform electrical diagnostics on the trans speed sensor connector first.
Wednesday, February 9th, 2011 AT 6:23 PM