Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Auto-dimming mirror does not work
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Old 02-12-2011, 06:55 PM   #3
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^^Good step 1 in the process of elimination. If your mirror doesn't dim in less than a minute, step 2 should be checking the connectors on the wiring going into the mirror, both for physical connection and for voltage (with the car running, a VOM should show nominal system voltage from around 12.6 to around 14 volts).

To go to step 3, you'll need to access Ford's online shop manual (since there isn't a commercial manual out for 2008+ models yet). Talk to your dealer's parts or service techs to get the wiring diagram you'll need to go on to test the connections further upstream.
All my relations, Christine
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