Would like diagrams Auto Temp Control?

1999 CHRYSLER LHS
200,000 MILES • 3.5L • V6 • 2WD • AUTOMATIC
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KEVINV1645
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1998 Chrysler Concorde Auto Temp Control LGB BILL Car dealership MEMBER1998 CHRYSLER CONCORDE 6 CYL FWD AUTOMATIC 128,000 MILES
Nov 30, 2025 at 6:39 AM
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STRAILER
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Hello Kevin, here is the HVAC wiring diagrams and a guide to help with the testing:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Let us know if you need anything else.
Images (Click to enlarge)
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Dec 2, 2025 at 9:20 AM
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KEVINV1645
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Awesome! These ATC'S :-(
Dec 2, 2025 at 10:02 AM
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STRAILER
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Yep, they can give troubles for sure, let me know what the problem was if you can :)
Dec 2, 2025 at 10:07 AM
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KEVINV1645
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Hi Ken L, The wire diagrams are very helpful, thanks! Looking for info specific to the pcb components, aspirator motor and the rest. Need to troubleshoot what fails. Don't believe its a BCM issue. ATC has no relay. Rabbit hole...I know. If you can help, great, if not, that if fine, also.
Dec 3, 2025 at 8:41 AM
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STRAILER
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Sure, I will help you, the first thing I would do is a CAN scan to see what codes are stored, please go over this video which should help us retrieve the codes.

CAN SCAN - https://youtu.be/u-4syLc-ifQ

Let us know how it goes.
Dec 4, 2025 at 8:12 AM
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