Installed a Prosport electric boost gauge (amber/white lighting) in my Evo IX. Tapped into the cigarette lighter wiring. I wanted it to be white and then switch to amber when parking/headlights are on. I tapped the red(power supply) wire and the white(white lighting) wire from the gauge to the brown (12v constant)from the lighter. I tapped the orange (amber lighting) wire from the gauge to the green (parking brake) wire from the lighter. Turned ignition to acc., gauge lights white, turn on Parking/headlights, gauge flicked amber for a split second then canges to white. I reversed the lighting wires, white wire to green wire and orange wire to brown wire. Turn ignition, gauge is amber, turn on parking/headlights gauge changes to white no problem. Unfortunatly this is the opposite of how I want it. Reversed wires back gauge only lights white. Any one else have this issue? Going to try and connect both lighting wires to a switch and connect it to the brown wire so hopefully I could just change guage color anytime. Anyhow, I know I have it connected correctly, don't know why it only works one way. Second question, after gauge goes through it's opening ceromony the needle stops below the zero (car is not running) it settles between the first and second markings on the vacume side. Other boost gauges ive' had ( on my WRX, greddy, autometer) always have set on zero (these are mechanical gauges). Is the gauge just caliberated that way and it's fine or is the caliberation off?

 

I have this gauge also, I don remeber correctly what wires were installed were, I do remember the instructions said, the white in the AC (dont remember the AC of the EVO, i think is red) and the orange one in the Parking, this can actually take them from the radio, wich makes it dimm.

from you second question, i have open the switch and the needles does stays in the zero, so maybe is not calibrate

 

My instructions should you could wire it either way, but it only worked the one way. Thats what I think the gauge is not caliberated right. Was told it could have just been caliberated that way. Have this gauge connected to the intake runner where the PCV hose used to go, so I'm going to connect a manual boost control to another vacume source to compare readings, I already had the hose for the manuall ran through the firewall then decided to go electric and just left the hose in place. Guess I'll also e-mail Prosport.

 

Sensor
Green - connect to green on the gauge
Black - ground
Red - Tapped it on the Ignition Coil fuse (interior fuse box)

Gauge
Green - connect to green on the sensor
Black - Ground
Red- Tapped the same Ignition Coil fuse as the sensor (interior fuse box)
Orange - Connect to stripe green/white wire on the dimming switch
White - Connect to stripe green/white wire on radio harness (behind radio of course)

anyone else interested in prosport gauges let me know, tons instock...

 

Dan, thanks 4 that wiring tip, I went ahead and put in a toggle switch, connected orange and white wires to the switch and wired switch to cig. lighter (brown wire). flick of a switch changes color without involving headlights. the way u have yours connected does it light up white and changes to amber with headlights or vica versa?

 

headlights off = white
headlights on = amber

 

i did just that but m having issues with the light changing colors.

the problem is that sometimes when i start my car, the gauge will glow amber(which its suppose to with headlights on)and sometimes when i start my car and turn on the headlights, the gauge will glow white, meaning when i turn the headlights off it will go to amber which is a pain in the a$$ to see during the day. m pretty sure its not suppose to do that.

sorry for the long write.