new gauges need help

[T's87lx]

got the indiglos from procarparts.com, put them in hooked them up the dont work, i was wondering im doin somthing wrong, i went to a 12v power source just to see what they look like, but the dont work, is there a hiddin wire or something i have to hook up, let me know please,

[wprocomp]

I am currently working on a how to on gauge install,I will try and get it up soon.you need a ground and plug it into your dimmer swtich,make sure your ground is solid too.

[anchovies]

Hook it up to your car battery to test. Make sure you turn the knob all the way up and down to test. Cover the gauges so you can see it more clearly.