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Old May 12, 2021 | 05:31 PM
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The O2 sensors were unplugged when I got my 09 Heritage. I can not find where they plug into the wire harness. Any help would be appreciated.
 
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Old May 12, 2021 | 07:41 PM
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Originally Posted by Dirtloco
The O2 sensors were unplugged when I got my 09 Heritage. I can not find where they plug into the wire harness. Any help would be appreciated.
This is from an HD Softail Service Manual.

Not sure if it's the same on all softails, but this may help you locate your O2 harness plugs....

If you consult the service manual for your particular year, it will show you....

 
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Old May 12, 2021 | 09:15 PM
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I located where the front O2 sensor plugged into under the front electrical caddy as in the pic. The rear is supposed to plug in under the oil tank but there is no connector under there. I found a connection that has a cap or plug in it but it dont look like what the O2 connects to.
 
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Old May 12, 2021 | 11:12 PM
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Check under the seat for the rear O2 sensor plug.
 
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Old May 12, 2021 | 11:20 PM
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Where would the connector originate from? The ECM? I don't see any blank connectors under the seat but everything is zip tied together. I wish I knew what the connector looks like.
 
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