02 sensor gauge hookup
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
02 sensor gauge hookup
I'm trying to connect an air fuel ratio gauge to a stock 02 sensor. It's a 1 wire hookup to one of the 4 wires off the oxygen sensor. How do I determine which wire to tap off of?
Senior User
Joined: Sep 2004
Posts: 484
Likes: 0
From: SC lowcountry
From 95 manual Pink/orange comes from fuse E engine compt thru heater to ground, Black; Gray/Light blue (HO2S input)goes to pin 29 of EEC, orange (heated oxygen sensor ground) goes to pin 49 of EEC. Looking at the emissions manual there is some variation to pin numbers on The EEC but the colors out of the HEGO remain the same. Hope this helps.
Posting Guru
Joined: Jun 2004
Posts: 1,781
Likes: 1
From: Central NY
Red Wire: Connect to a fused and switched 12V positive source
that is turned on and off with the ignition switch
Black Wire: Connect to good engine ground.
Violet Wire: Connect to oxygen sensor signal wire. Connect to
vehicle wiring harness, not oxygen sensor since some oxygen
sensors use shielded wire.
White Wire: Connect to 12V Dash Lighting. (Cobalt Series Model
6175 Only.)
Cheers,
Popa Tim
that is turned on and off with the ignition switch
Black Wire: Connect to good engine ground.
Violet Wire: Connect to oxygen sensor signal wire. Connect to
vehicle wiring harness, not oxygen sensor since some oxygen
sensors use shielded wire.
White Wire: Connect to 12V Dash Lighting. (Cobalt Series Model
6175 Only.)
Cheers,
Popa Tim
