Hi i've been reading the forums for awhile and am still pretty new but trying to learn as much as I can. I recently bought a 2008 Evo MR and I am pretty happy with my purchase. So I bought a Prosport Evo series boost guage to install and am having difficulties. Everything is hooked up but I am having trouble actually wiring the boost guage it seems everything I try doesn't work. This is how I have it currently wired.

From the sensor I ran the red, black, and white cords into the the car.
From the gauge you have red, black, orange, white, and red.

I connected the green wire from the gauge to the white cord from the sensor.
The black from both are grounded to the bolt in the bottom right side of the fuse box located in the car.
Now this is where I am stuck.
I bought two of the attachments that go into the fuse and have a wire coming out to tap into them.

I used one for both red wires, and then one for the orange wire. The white wire I have running in.

Now the problem, Every fuse I have tapped causes whatever the fuse to go to not to work. It's like the sensor and the boost gauge are pulling to much power and I have tried several options but have not found a solution. If anybody can show or tell me how they wired the gauge it would really help. I've tried searching to no avail. If need to I'll take pictures. Thanks.

Not really worried about the orange wire.

 

getting power by jamming a wire in the fusebox is a terrible way to do it....but if you're going to...lose the adapter thing and just jam it in there. There are lots of places to tap alternate power properly from a wire, that's really what you should do.

By fuse "not work" do you mean it blows the fuse? If that's the case, then yeah too much current. If the accessory doesn't work, then you're adapter things are defective.

 

Yeah i'm not just jamming the wire's into the fuse. I'm using the wire tap were you plug the fuse into it and it also has a cord running off of it.

It's not blowing any of the fuses but whatever I tap into the corralating function does not work. So if I plug into say the door locks then the door locks don't work.

 

I had problems installing a prosport wideband gauge. Then I read somewhere that if your car is equipped with keyless entry you can’t go by one of the how-tos on this forum because keyless entry sends constant power to one of the fuses. Therefore the gauge will always stay lit.

What you need to do is get a cheap multimeter open up where the radio is and stick the prongs into the sockets to find out which one is constant, which one is intermitt. Also there is a chart somewhere on this forum that shows which colors do what.

Don't go by that fuse how-to it caused me more problems then good.

 

I have both a prosport digital boost gauge and digital wideband installed in my car using those fuse taps. You need to grab your car's owner manual and look up the diagram for the in car fuse block. There's a guide on our forums that I tried to follow for wiring gauges, it did not work following that guide. I checked my owner's manual and my layout was vastly different from what was posted on the forums. You just need to find an ignition source and a 12v accessory source. I didn't hook up the dimmer wire because for some reason one gauge had a dimmer wire, but the other didn't. So again, use the directions that came with your gauges and your owners manual and you can't go wrong - no need for a multimeter.

Oh, and not sure if this is a no brainer thing or not but make sure you have fuses in both sockets on the fuse tap.

 

Dam, I feel like a dumb *** now. Well as you can probably guess I only had 1 fuse going into the wire tap. Go figure. Thank you for the help.