I've done some searching on this issue, found a question, but no answers so hopefully can find someone who has had this issue and can shed some light on it.

I have the brake light on my dash come on, a lot now, both when warm and cold. I found a thread that suggested it could be the brake reservoir cap, so I ordered a new one, but did not solve the issue. The brakes work fine, the fluid level is just under max, and made sure the E brake is down. Any thoughts on what else could cause the light to come on? Thanks in advance..

 

Check your brake light bulbs

 

Same here. It just comes and goes for the last few years and haven’t bee able to determine the cause

 

Is this light different from the Brake light that comes on when the E-Brake is engaged?

 

In my experience, it was because I replaced brake lights with LEDs..

I ended up just popping off the cluster and braking (pun intended) off the led under the "brake light".



Hence my suggestion of. "Check your rear brake lights"

 

I checked the brake lights, all are working correctly. Any other thoughts?? I have a my third brake light turned off and have a light on my spoiler. It has been on since 2007, but maybe could be a cause??

 

perhaps.

Try putting a bulb back in 3rd brake light. if that works, then a fix would be to buy a resistor and install it on that circuit to trick the computer into thinking a bulb is present.

 

Make sure the brake fluid level is full, check (clean) the sensor inside the reservoir cap.

 

I actually never took the bulb out of the original 3rd brake light. I unplugged the plug for it and plugged my spoiler brake light in it. I have had this set up for about 8 years now and this problem is only a few months old.

 

Ahh..

For me it was the left bulb (driver's side) when I replaced it with an LED, it would turn on the dash light (theoretically i think it's to alert you to check your brake lights and make sure they're not out). I believe the bulbs in your CL is dual intensity so check and make sure both filaments are still intact.


Also you can check the brake fluid level like poster above recommended