Wire plug identification

[thechamp]

71 Dodge demon, originally slant 6 now 340. Can anyone identify this pig tail?
It’s coming from the area of the engine harness with the alternator wires in it.
I’m guessing a/c plug but I am not sure..thanks

 

[Vaanth]

71 Dodge demon, originally slant 6 now 340. Can anyone identify this pig tail?
It’s coming from the area of the engine harness with the alternator wires in it.
I’m guessing a/c plug but I am not sure..thanks

View attachment 1716473382

The pictured connector connects to the solenoid vacuum valve which is part of the NOx emissions control system.

The original solenoid vacuum valve looks like the following image:

On a six cylinder the valve was mounted to a bracket located as shown in the following image:

The wiring for the valve and system for an automatic transmission car is as shown in the following image:

The wiring for the valve and system for a manual transmission car is as shown in the following image:

If not used, the connector can remain disconnected.

For more information on the system, see section 9A of the 1971 factory service manual.

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[thechamp]

I believe I will be deleting that plug then. Thank you