I just ordred an oil PSI gauge from glowshift on ebay and I am curious how to install it. The directions are extremely confusing and I am having trouble figuring out how to install it. This is going on a 96 civic dx. I was also curious where the ignition switch wire is.

 

Use a test light for the ignition wire, but basically any switched 12v source will work when the ignition is on. You'll also need a ground, and the guage should come with a pressure switch assuming this is an electric guage. The pressure switch just goes in place of your stock idiot light switch on the back of the block, or you can run them inline with a Tee. Run the signal wire from the press. switch to the guage and your done. Be sure to use Teflon tape on your fittings, and check for leaks.

 

I ran both sending units in my car and used a SS braided hose and brought them over to the fenderwell and then Teed to my turbo. I used my stereo on for my power for all my gauges and the illumniation for the stereo for all the lights. Works great. So on your guage you should have 2 wires to ground, one to the sending unit and one to the +12v power on.