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Cascading electrical systems failure on 2003 Ford Crown Victoria

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My '03 CV Sport is sending me some bad vibes. First, the blower motor failed, then the power locks, inside trunk release failed, including the outside number pad and remote. I paid for a diagnostic, and they tell me the door control module is bad, but have also been told that the body control module may be suspect. The diagnosticians told me that I need to replace the blower motor speed controller, however the entire HVAC control assembly was replaced last year; only blew threw the defrost.
I disconnected the wiring harness from the blower motor and hooked up an auxiliary switch and the motor runs fine, including heat & A/C.
What would your recommend ?

Thanks,

Brad Clark
kc9bjo@yahoo.com
Columbus, Indiana
(1) Answer