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afr guage 

 

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 Post subject: afr guage
Posted: Fri Apr 03, 2009 12:37 am 
Stock as a Rock
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Location: whyalla
SA, Australia

can anyone tell me how to wire up a ford aftermarket three wire oxy sensor, to a afr gauge, on the oxy sensor it has 1 blue and 2 black wires, i take it as the blue been the signal to the gauge, but what are the 2 blacks for, is one a ground and one a 12v, or both blacks are grounded to the motor or something, cheers.
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 Post subject: Re: afr guage
Posted: Fri Apr 03, 2009 10:16 pm 
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Age: 33

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Joined: 26th May 2008

Ride: EF XR6

Location: Brisbane
QLD, Australia

If it is a three wire heated O2 sensor they are the power and ground wires for the sensor. I don't think it makes a difference which is ground and which is power, not 100% on that though. To wire the gauge you will need to tap into the sender wire and get power, ground and dash light wires hooked in to the gauge.

 

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 Post subject: Re: afr guage
Posted: Fri Apr 03, 2009 11:00 pm 
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Ride: Fairlane Concorde 4.0

Location: wagga
NSW, Australia

The 3 wire sensor has one ground connection and one heater wire. It also has the Oxy output wire as well which totals 3 wire. The Black wire is the ground and the white wire with the lowest resistance is the +12v for the heater. The other white wire is your HEGO output wire too the ECU. This is the wire that goes to the A/F gauge. For the EF/EL it is the Dark Green with Dark Blue trace.

 

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NF Fairlane: Non Factory Dual Fuel - New coolant tank, New fuel injectors, New fuel pump, New earth cable, ECU capacitors replaced, New O2 sensor, leads and plugs, New Radiator/Condensor cleaned. 483,000kms. AU I6 Powered. Struts, Shockies, Tie rods and ball joints replaced.

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 Post subject: Re: afr guage
Posted: Sun Apr 05, 2009 1:46 am 
Stock as a Rock
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Joined: 16th Nov 2005

Location: whyalla
SA, Australia

cheers guys the oxy im using is a aftermarket one a aca ox207 it has 2 black and 1 blue so il just use the blue as the signal to the gauge and the 2 blacks il put as 1 12v and one ground see how i go with that.
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