Sometimes when I step on the brake, the "lamp out" trouble light comes on, and the left signal lamp speeds up, indicating a light is out. This will last for a few minutes, and then goes away. Step on the brake, use the turn signal, all is well. I have replaced two light bulbs(signal and brake) on the left side, so its not the bulb. Anyone has had this problem? If you have any advice, that would be great. Thanks.