wiring a a/f ratio gauge

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10-05-2006, 10:31 PM

90stangGT

Thread Starter

Join Date: Mar 2006

Posts: 20

wiring a a/f ratio gauge

its got a black, red ,and purple wire. i'm assuming black and red are ground and hot. but whats the purple wire???

10-05-2006, 11:12 PM

PRO50SC

The Rogue Mod

Join Date: Feb 2006

Location: Maryland Sucka's!!

Posts: 21,918

RE: wiring a a/f ratio gauge

It hooks to one of the wires on the o2 sensor. Which one off the top of my head not sure.

10-05-2006, 11:24 PM

will

2nd Gear Member

Join Date: Sep 2005

Location: Ohio

Posts: 387

RE: wiring a a/f ratio gauge

Red=Heater +
Black= Heater -
Purple=Signal to gauge

10-05-2006, 11:30 PM

TwotoneVert

5th Gear Member

Join Date: Jul 2006

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Posts: 2,596

RE: wiring a a/f ratio gauge

PRO50 is correct. What brand is it, mine had a power, alt power, o2, and ground. I replaced my O2 sensor when I installed mine, and the book gave no indication as to what color the sending signal wire was, so stripped all three and connected them one at time, when I found the right one, I just replaced the sensor and connected it to the correct wire.

10-06-2006, 12:17 AM

AdderMk2

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Join Date: Dec 2005

Location: Lil' Rhody

Posts: 22,376

RE: wiring a a/f ratio gauge

sell the gauge to a ricer and get yourself a wideband....

a narrow band gauge like you bought is only good for one thing... a light show in the car

10-06-2006, 12:20 AM

PRO50SC

The Rogue Mod

Join Date: Feb 2006

Location: Maryland Sucka's!!

Posts: 21,918

RE: wiring a a/f ratio gauge

Quote:

ORIGINAL: AdderMk2

sell the gauge to a ricer and get yourself a wideband....

a narrow band gauge like you bought is only good for one thing... a light show in the car

Not true, if there is a malfunction in your fuel system you will be able to tell cuz the gauge will stay rich or lean and not fluctuate.