Brake Light problems of the 2002 Chevrolet Cavalier

Problem with electrical system that operates rear blinkers and brake lights. I have changed bulb which are not the problem. I have changed the electrical connectors. Works fine for short period of time when either of these are changed but still not fixed. Started with passenger side but now having issues with driver's side. Online forums suggest many others are having this issue as well. Cant find a permanent fix. Please help. Is not blowing the bulbs, just stops working for no apparent reason.

Purchased vehicle from dealer 7/12/13 with the following issues: non-working odometer, blinkers, brake lights that frequently "short" out & a non-working windshield fluid function. I was informed by the dealer to take vehicle home & return it the following day for the repairs of all the above notations that were discovered during a test drive. Upon the time of return, I was sadly & rudely approached by the dealer. He stated that he did not claim to fix these issues? on 7/17/13, I filed a "complaint" with the better business bureau regarding this poor business transaction. All of which, I have proof. Despite my endless efforts to correct this issue, nothing significant has been done on my behalf. I have been pulled over a number of times, because of my failing brake lights - which have been replaced on multiple occasions. I have had close encounters of potential dangerous situations, where my blinkers have failed & being stuck "not" knowing how much mileage I have on my car. This is a major safety issue I cannot get resolved & am hopeful that you may assist.

Driver noticed that driver's side brake light was inoperative. Vehicle was taken to a garage for inspection, and mechanic determined that the bulb needed to be replaced.

The vehicle's brake lights failed prematurely. Please provide additional information.