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Old 01-07-09, 11:22 PM
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Re: 91 deville ac problem

Okay - Ricklh: Since you have a hard F12 code, the diagnostic process can be largely done within the onboard system. First step is to enter diagnostics, wait for codes to run and the FDC display to show .7.0

Next, depress and release the OUTSIDE TEMP button to enter the BCM data series. The FDC will display F.8.0 . Advance through the output channels by pushing the HI button until you get to P.2.8. Write down the number displayed and let me know what it is.