Wiring an AFS-75
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Joined: Jun 2003
Posts: 5,028
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From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Wiring an AFS-75
I have searched and found a post that listed the wiring as:
Brown-heater power
Black-heater ground
Purple-sensor signal
Tan-sensor ground.
Only problem is my pigtail (connector to harness) for a 4-wire AFS-75 from a F-body has the colors as black, tan/white, purple/white and pink. This is also the way they are listed in the wiring diagram (http://ls1tech.com/forums/7752004-post72.html)for one. Then my sensor's wires (sensor to connector) are brown, brown, purple and tan.
The LS1 diagram shows black is ground, pink is a hot fused 12V, then purple and tan both go to the ECM saying high and low O2 signal.....
The sensor is a genuine A/C Delco along with the connector. So how do I wire this?
Brown-heater power
Black-heater ground
Purple-sensor signal
Tan-sensor ground.
Only problem is my pigtail (connector to harness) for a 4-wire AFS-75 from a F-body has the colors as black, tan/white, purple/white and pink. This is also the way they are listed in the wiring diagram (http://ls1tech.com/forums/7752004-post72.html)for one. Then my sensor's wires (sensor to connector) are brown, brown, purple and tan.
The LS1 diagram shows black is ground, pink is a hot fused 12V, then purple and tan both go to the ECM saying high and low O2 signal.....
The sensor is a genuine A/C Delco along with the connector. So how do I wire this?
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: Wiring an AFS-75
I have searched and found a post that listed the wiring as:
Brown-heater power
Black-heater ground
Purple-sensor signal
Tan-sensor ground.
Only problem is my pigtail (connector to harness) for a 4-wire AFS-75 from a F-body has the colors as black, tan/white, purple/white and pink. This is also the way they are listed in the wiring diagram (http://ls1tech.com/forums/7752004-post72.html)for one. Then my sensor's wires (sensor to connector) are brown, brown, purple and tan.
The LS1 diagram shows black is ground, pink is a hot fused 12V, then purple and tan both go to the ECM saying high and low O2 signal.....
The sensor is a genuine A/C Delco along with the connector. So how do I wire this?
Brown-heater power
Black-heater ground
Purple-sensor signal
Tan-sensor ground.
Only problem is my pigtail (connector to harness) for a 4-wire AFS-75 from a F-body has the colors as black, tan/white, purple/white and pink. This is also the way they are listed in the wiring diagram (http://ls1tech.com/forums/7752004-post72.html)for one. Then my sensor's wires (sensor to connector) are brown, brown, purple and tan.
The LS1 diagram shows black is ground, pink is a hot fused 12V, then purple and tan both go to the ECM saying high and low O2 signal.....
The sensor is a genuine A/C Delco along with the connector. So how do I wire this?
Brown & brown are power (IGN+ switched) & ground (engine block).
Purple is the signal to the ECM
Tan is the signal ground, which can go to the ECM, or the engine block if the ECM already has a ground to the block for the O2 ground input.
RBob.
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