They have a bad ground, if you notice all the other lights back there will be dim also. You need to track your ground wire or check your light bulb socket and make sure its getting a good CLEAN ground.,
Check the ground wire to the brake lights.
A device to gradually dim the brake lights after they are held on for over a set period of time.
I have a 1983 GMC Sierra it has no dash,tail lights an brake lights are very dim
You are experiencing a voltage regulation problem. If you look at your headlights during that rev period, they should appear brighter also. The taillights, during braking, load the electrical system and therefore, drop the voltage and cause the lights (all lights, they are most easily noticed) to dim. Go to an Advanced Autoparts store and have them test your charging system for free.
check for a loose ground wire
Dim All the Lights was created in 1995.
All bulbs will dim over time and then eventually go out. See the Sources and Related Links section below to lookup light bulb info.
a common cause of rear lights staying on is a bad ground. Have someone watch the brake lights while you turn on the park lights. if the brake lights go out, or dim noticably, seek corroded, or broken ground wiring at or close to the tail light sockets. another easy reason is the brake switch is out of adjustment, or faulty. set your cruise control, and apply the brakes. i am not certain, but most systens use the brake switch to turn off the cruise. in your case the cruise may not engage. Good luck. hope this helps.
You should dim your lights as soon as you see their lights.
How dim? There are several possible answers. First, the output of the light coil is directly related to the engine rpm. Second, if the regulator/rectifier is not functioning properly, the lights can be dim. Third, if you have a poor ground connection the lights will be dim.
depress the brake pedal and turn the engine switch to the start posiiton and start the engine,,, Does this mean to hold the brake down until you hear the engine start.
when you see there lights you should dim yours