Quick question for you guys!
So I just ordered some gauges and one of them is a voltage gauge. When I was going through and setting up some of the wiring tonight, I came across a problem that might persist, one that I am not quite sure how to fix. So basically, I want to hook up the two gauges so that when the interior lights are dimmed using the dimmer, the backlights will dim as well. I have seen this before and it seems relatively easy. I have the boost gauge install all figured out but the volt gauge I am not quite sure on for one reason. That is, how is the volt gauge supposed to read accurately if the positive is connected to the positive feed in the dimmer switch and the negative to ground? Won't the positive feed change depending on the dimness that the switch is set to? If so, is there any way I can go about fixing this? I know the gauge I ordered has a black and a red wire coming out the back.
Thanks,
Max