Okay, I got everything good to go excpet the illumination. I can't get it to dim with the rest of the gauges. I have the Defi boost gauge dimming with the console. I can get the gauge to either stay on with the park lights or I can get it to dim but the opposite of the other gauges. Here is the wire setup:

Orange - Switched 12v on
Red - Constant 12v on
Black - Ground
White - 1) Green/White of dimmer switch - comes on with park lights, but no dim
2) Black/Yellow of dimmer switch - dims, but opposite of console.

To get the boost gauge to dim with the console I have

White - Green/White
Black - Black/Yellow

hmmmm.....thanks in advance...

 

Here's what I've found out so far using my trusty Fluke meter...

Off the dimmer switch...

Black - Ground
Green/White - constant 12v
Black/Yellow - Variable voltage, but interestingly, as teh voltage increases, the console dims...hmmm

To get the boost gauge to dim with the console, I've essentially connected the ground to the variable voltage and the postive to the constant...I know if I do this with the Pressure gauge it will do the same, however, I'm not sure if the ground for this particular switch is used soley for teh lighting or is also a ground for teh stepper motor inside the gauge and how it would effect the behavior of the gauge...

 

I had the same issue a few weeks ago with my Defi boost gauge. I had the same weird "reversed" dimming issues. In the end, I just made the gauge illumination stay on 100% when the light-switch is on.

There is a post at https://www.evolutionm.net/forums/sh...ad.php?t=80842 which another person says he got the gauge to dim- however I was unable to get the same result.

 

All my Defi - D, I just use the illumination and ground wires.

 

So you're saying you don't use the orange or red wires at all? I am in the process of doing this myself. I already have my defi d boost gauge hooked up. No dimming, just on or off. I wasn't sure where to connect the red and orange on the oil temp and oil press when I install them. If you left them unhooked, I don't see a problem with that, I never dim my lights anyhow.

Can anyone else help us on how to hook these up properly? I saw a post somewhere saying to tap into the cig lighter, but nothing else.