Hello,
On this Town Car the air suspension and power steering both are control by one control module. So when the control modules has an issue it will impact both the suspension and the power steering.
It could make the compressor to work one day not the other. The nature of the failure is many times intermittent. But eventually it can quit all together.
Is your check engine light illuminated?
Sometimes the module can trigger the engine light.
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
That control module is located under the passenger side dash (see diagram below).
It can also be a wiring issue with the control module. I have attached wiring schematics.
https://www.2carpros.com/articles/how-to-check-wiring
I have attached diagrams for your reference.
Please let me know of any questions.
Thank you.
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Sunday, August 15th, 2021 AT 8:20 PM