i bought these from someone on the ORG, they are originally from Paradox. how do i control the colors on them? when i connected to 12V battery they just light up green. what does that strip with 4 colors do??? please help

here is the pic of them:

http://www.eden.rutgers.edu/~vsapunov/IMG_2501.JPG

 

With the half circles? Isnt that the color designator?

 

they seem like buttons, 2 buttons total, but they didnt change anything when i pressed them. i installed once gauges on 2000 celica and it came with switch (blue/green) and a rotary **** (variable resistor to dim), but this set dont have it. thats why i dont get how to control the colors

 

Yea - my old ones have rotary dim. I've never seen the ones in the pic before. I guess give the guages some juice...and press one of the buttons ?