Originally Posted by thekrohn
This is a common problem with double filament bulbs. If one filament touches the other strange things happen. Usually the brake and tail lights are in the same bulbs and if the filaments touch feedback occurs causing problems similar to yours. The bulbs may check out on the bench across a battery but my still be defective. It only takes one to create the difficulty. I could tell which was the offending bulb by letting someone step on the brake and operate the signals while watching from the front and then the back. In the front the turn and parking filaments are usually shared by one bulb. Check out this info before going to additional expense when only a bulb may be the problem
thekrohn
thankx for the info man, i was stressing going to the dealership and having them rape me for something little like this, i'll give it a try this weekend, and see if you're right. i already changed the bulbs in the back but it still didn't work........so , i'll do the fronts tomorrow. btw, what's that little black box attached to the left taillight?