Ok I am wiring the gauge to the ECU
the two wires it connects to are A6 Or/Wht
and D14 Wht. Auto meter gauge I have has
a black wire (Ground) and a purple and red wire.
Which wire connect to what Ecu wires?

 

what year lude? on my 92 Si, there was a power and ground for the backlighting, a power and ground for the gauge, and a sensor wire that went to the bottom solid white wire going into the ecu.

 

the wires are power, ground, and signal. Power is for the light. Or probably the red wire. To find the signal wire at the o2 sensor plug, use a power tester. if it lghts up thats not the signal wire. When you find the power wire to the o2 find the ground by using continuity. The last wire will be your signal wire. Then you can use continuity between the ECU and the know signal wire at the o2 sensor. It may sound ghetto but it works. Thats how I had to wire my a/f gauge and my a/f controler. Cause I had no instructions. Any questions e mail me.

p.s. you can get a cheap fluke meter at walmart for about 20.00, thats what reads for power, volts, resistance, and continuity. I recomend getting one if you plan on doing a lot of wiring.

 

Thanks guys I give it a try.