The windows are not directly fused, they are operated by the front control module (Fuses are listed listed under "FCM" in the Integrated Control Panel under the hood), this is a computer module, you must have it tested by a well equipped shop with the right scan tool to operate the test function the FCM.
In order to obtain conclusive testing of the heated seat system, the Controller Area Network (CAN) data bus system must be checked.
The most reliable, efficient and accurate means to diagnose the heated seat system requires the use of a Scan Tool and the Service and Body Diagnostic Information.
Diagnostic logic is built in to the seat module and the instrument cluster (CNN) to help the person trying to locate the problem by the most efficient means possible. Anytime a problem is suspected, a Scan Tool should be obtained and used to retrieve any stored fault codes in the heated seat module and/or instrument cluster.
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