Temp gage beeps why nd why does it go lower nd lower as I drive it

Hello, the temperature gauge keeps as it goes down because it's warning you as to the possibility of ice on the road forming. This is a normal function. Now, if the ambient temperature gauge reads different than what the temperature outside really is - by a large amount - then there could be a concern with the sensor or wiring. The brake light is a different story - if the red brake light comes on, do not drive - have the vehicle checked as soon as possible to find out what is going on. It could be a major safety issue. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops