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#1 |
Registered User
Join Date: Aug 2011
Location: Grand Blanc Mi
Posts: 22
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Ac wire question
I have a 71 Chevy and the air compressor won’t engage however I did notice that there is a plug under the dash(2green wires and 1 yellow) it’s a 2 post plug and I can’t find where it plugs in .. any help will be appreciated.. thanks
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#2 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,542
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Re: Ac wire question
If I'm not mistaken it should plug into the switch near the center vent? (if that makes sense)
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#3 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,640
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Re: Ac wire question
Sounds like the 2-prong plug that goes to the A/C compressor switch. Kinda hard to find but it's located behind the heater box under the dash, slightly to the right of the cig. lighter. This is what you're looking for:
![]() The switch mounts with the connector prongs down, and the button activator on top. The button is operated by the A/C and Heater outlet slider at the center of the HVAC control.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#4 |
Registered User
Join Date: Aug 2011
Location: Grand Blanc Mi
Posts: 22
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Re: Ac wire question
Yes that’s it....mine is missing but at least I know what I need now.. thank you
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#5 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,640
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Re: Ac wire question
Glad I could help. Last year we did a lot of A/C work on my K20 and had several issues. Installed virtually all new parts but compressor would not come on because that switch was faulty. Had a bear of a time finding it and replacing it.
Good luck with yours.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#6 |
Registered User
Join Date: Aug 2011
Location: Grand Blanc Mi
Posts: 22
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Re: Ac wire question
I do have another question.. the pass floor vent opens with vacuum but doesn’t close .. is there supposed to be a spring on the door to close it??? Thanks Jim
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#7 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,640
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Re: Ac wire question
Yes, there's a spring from the vacuum actuator to a tab on the vent door.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#8 |
Registered User
Join Date: Aug 2011
Location: Grand Blanc Mi
Posts: 22
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Re: Ac wire question
Thanks again.. Jim
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