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09-12-2025, 11:55 AM
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#1 |
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Registered User
Join Date: Jul 2012
Location: Concrete, wa
Posts: 79
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HVAC controller not working
I just changed out my alternator last week and every thing works except my HVAC. No screen, buttons or lights. I don't know if there is any connection, but that is the only work that had been done.
I tried another box that the seller said worked when pulled from another rig. Does anyone have a schematic that shows where the wires from the 12 pin plug go. I need to find where the switched power comes from. The truck is a 92 ECSB K1500. Thanks Steve
__________________
1989 Silverado K2500ECLB- 307K miles with 90 K TBI 350-Not a show truck, a work tool that I can drive! 1992 K1500 ECSB- 190K miles- I guess I'm just a truck guy now! |
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09-16-2025, 06:09 AM
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#2 |
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Registered User
Join Date: Aug 2015
Location: Las Vegas NV
Posts: 380
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Re: HVAC controller not working
Which wire are you wanting to explore?
__________________
Customization is what you want it to look like -- not what other people think it should look like |
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09-17-2025, 02:27 PM
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#3 |
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Registered User
Join Date: Jul 2012
Location: Concrete, wa
Posts: 79
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Re: HVAC controller not working
Apparently all 16 of the wires that come out of the connector.
I need the complete schematic or wiring diagram for the dashboard area. I would imagine that it's the rest of the picture that you showed that shows the other ends of all the wires.
__________________
1989 Silverado K2500ECLB- 307K miles with 90 K TBI 350-Not a show truck, a work tool that I can drive! 1992 K1500 ECSB- 190K miles- I guess I'm just a truck guy now! |
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09-18-2025, 02:35 AM
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#4 |
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Registered User
Join Date: Sep 2020
Location: Everett Wa
Posts: 29
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Re: HVAC controller not working
Here is the complete ac diagram that should match your system
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