The quick flash is an indicator that the rear isn't working. If you take a test light to the brake / signal socket, do you get power? If not, you need to follow the power wire until you find a break in it. Keep in mind, if you follow the wiring from the tail lights, I believe there is a plug-in to another wiring harness that could be corroded, loose, or damaged.
Here is a wiring diagram to help you see how the system works with a guide to help you test
Check out the diagrams (Below). Please let us know what you find.
Images (Click to enlarge)
Thursday, April 16th, 2009 AT 8:42 PM