Boost gauge dimmer wiring problem
 

I am wiring up my boost gauge. It has a black for ground, Red for 12v and yellow for dimmer. I need to know which is the best location to wire the yellow dimmer for the boost gauge light. I have tried the purple wire to the dimmer switch. It doesn't dim. The light stays constant. Can someone help with the local to place the yellow wire so it dims the light. Thx in advance. Steve

Lots of people installing gauges this week. I tapped my dimmer wire into the "panel" 10amp fuse under the dash.

cubix, I remember n some past post I have been reviewing for the last 3 hrs, something about the 10 amp panel fuse. But I'm not understanding completely how the boost gauge light will dim. Is this 12v from the 10amp the analog wire that will operate it? So I will put the red wire from the gauge to the purple wire on the dimmer switch for headlights, and yellow to the 10 amp Panel under the dash. Do I have that correct? Thx partner

I didn't splice any wires at all. I used those "add a circuit" fuse taps and tapped the following:
- Constant 12v power into the "STOP" fuse
- Switched 12v power into the "DRL" fuse
- Dimmer wire into the "PANEL" fuse
- Ground wire into the bolt

https://s22.postimg.org/6sbm5pyj5/photo_5.jpg

Does the gauge dim along with the speedo backlight?

cubix I understand now partner. I will get them tomorrow and get it done. The picture and notes explain it perfectly. Thx so much Steve

Yep. When its night time it dims by about 30% along with the rest of the interior lights and radio.

Ultra, at this point I am willing to give this a try. I swear this reverse voltage bullshit Subaru crap is crazy. I never once faced any crap like this working on Aerospace ground equipment in the Air Force or on C-130,s or F-15 B models and c models. How freaking difficult should be I just want to wire up a boost gauge so it works and dims when I turn on the lights and want to dim it down at night like my gauges because its to damn bright. What the hell man. Any ideas??

cubix not to be confusing myself anymore than I already have damn it. I am, clear I believe in your last message, so by dimming like you sad with this method, that dimming will happen via me scrolling the dimmer on the dash or its automatic when the it gets dark?

It's not a nitpicky question because I'm not really clear either. I'm almost ready to assume it will dim with the knob because I'm guessing @Cubix means it dims when the running lights are switched on. Right? :iono:

shhheeewww thx partner I swear I thought for a minute I'm losing it. I want to get the gauge 10-8 strait. Then Monday morning I start the open heart surgery of the sprintex. I'm un-marring the oft tomorrow and flashing my ecutek, Delicious 9.5 tune. Then mon I'm=going in deep Ha Ill keep you posted. Best regards my friend. Steve

It dims when you turn on the lights. With the knob or it set to auto. When the radio dims, the gauge dims.

Suh-weet! I've been dragging my feet on the light for my oil pressure gauge. You da man.

cubix, just dawned on me. My particular gauge only has a 12v red power wire. which this one they suggest goes to 12v switched. I have a yellow wire which is the dimmer wire. then a ground wire. So I will try the 12v switch to the DRL fuse. The yellow to the panel fuse/ then black to ground. I will see what happens. If that doesn't do it, Tell me what gauge you are running and I will mirror your set up if you don't mind. Thx again Steve