Thread: 1991 W126 rear defrost defogger switch question
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Old 12-31-2011, 05:46 PM
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sixto sixto is offline
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Join Date: Jun 2000
Location: Eastern TN
Posts: 20,851
For late 126s, the switch is just a switch. The brains are in the N10 combination relay in the fuse box. Maybe early 126s have a different arrangement and you have the wrong switch.

Sixto
87 300D
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