My park brake lihht in my 2010 GC is staying in. When started van will go through regular test, brake light will go out and thrn come back on 30 seconds later. Fluid level is good in mater cylinder and switch for park brake foot peddle is not activated. What else csn trigger light?

plugging an unplugging fluid level sendir has no affect. If park brake peddle is pushed down light will not go out aftet self test upon starting van.

help!

 

I've confirmed that peddle switch is working as it should. If i unplug the reservoir level sensor would it normally turn light on or leave it off?