Temperature gauge not working right.

-Not sure whats wrong, but my temperature gauge isn't always coming on. It may come on for a few minutes, but that's it...Oh, I can make it come on when i honk my horn.. I you know anything please help!

-Also, i thought i was supposed to have a cruise control light, but when i use my cruise control there isn't one.

-Another problem is that my passenger side rear door's tweater doesn't work all the time, and when it does it usually goes off when the door opens.

IF ANYONE HAS ANY INFO OR KNOWLEDGE ON ANY OF THIS..PLEASE REPLY.

replace your ect.

Cruise switch is problably bad.

don't mean ta sound dumb, but whats an ect?

Engine coolant temperature sensor.

Alright, I'll do that and see what happens. Thanks.