Do you have any gauges to check and see if there is any Freon in the AC system? the flashing lights may be an indication of low Freon. Okay, this sounds like the control head is the issue. If it was an issue with the compressor or any part of the control system, the rear A/C controls would not function.
I attached the procedure for replacing the control head and a wiring diagram for the system. Check the fuses for power on both sides.
Check out the diagrams (Below). Please let us know what happens.
Images (Click to enlarge)
Sunday, February 7th, 2021 AT 1:22 PM