Checking lamp stoplight

The efficiency of light stoplight better check together, but can be checked independently. In the first case it is necessary to apply the brakes, while the assistant monitors the stop lamp signal. In the second case, you need to approach the rear of the car to the garage door or wall fence and press the brake, watching in the rearview mirror for the reflection of a burning red stoplights. If one lamp is not lit, it is necessary to replace it. If both lamps do not light up, check the serviceability limit switch.