my brake lights works. but when u step on the brake only the driver side is getting brighter. & the passenger side is not..

what else to check to fix this problem
thanks all...

 

its a dual filament bulb. one illuminates when lights are turned on, the other illuminates when the brake pedal is pressed. running lamp is usually about 8watts, while the brake is 27watts. replace bulb, problem solved.

 

i did replace bulbs but it seems the problem is still there what else to check?

the passenger side the very right bulb light doesn't bright when i step on the brake. but it have a light.

 

swap the driver and passenger bulbs, does it do the same thing?