O2 Sensor wiring?
Thread Starter
Drifting
Joined: Sep 1999
Posts: 1,411
Likes: 1
From: Wylie TX
O2 Sensor wiring?
I'm getting an A/F meter form my '69 and I have an old '94 LT1 4 wire O2 sensor that I plan on using. I gave away my '94 service manula when I sold my car, so I don't have a way to figure out which wire needs to be connected to what. Can somebody help me out?
I had written down the colors of the wires, but I forgot it at home. I think there was 1 purple, 2 brown, and I don't remember the other one.
Thanks
I had written down the colors of the wires, but I forgot it at home. I think there was 1 purple, 2 brown, and I don't remember the other one.
Thanks
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: O2 Sensor wiring? (Chris A)
Chris,
Typically when there are three wires. The two that are the same color, in your case the brown wires, are the ground and the hot (power). The odd ball, or purple as you mentioned would be the O2 sensor (data if you will) wire that would plug into your cars harness. This should clear things up for you.
Typically when there are three wires. The two that are the same color, in your case the brown wires, are the ground and the hot (power). The odd ball, or purple as you mentioned would be the O2 sensor (data if you will) wire that would plug into your cars harness. This should clear things up for you.
Thread Starter
Drifting
Joined: Sep 1999
Posts: 1,411
Likes: 1
From: Wylie TX
Re: O2 Sensor wiring? (ski_dwn_it)
That's what I figured about the two brown, but this is a 4 wire sensor not a 3 wire one. The 4'th wire is a signal ground. So, I'm not sure which is the signal ground wire and which is the signal wire.
