My Prosport water temp gauge mod and install

[Prosport Gauges]

Originally Posted by RotaryXperiment

dimmer switch being too low (depending on where u tap for the source) WILL affect the lighting not changing.

put the dimmer all the way up (full 12v) and the light will change.
sometimes itll even flicker if its not getting the full amount of voltage.

That is exactly right, you need 12v to get the color to change. Also we have the upper radiator hose adaptors to make installing the temp sender fast and easy.