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Old 07-02-2003, 01:18 AM
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Join Date: May 2003
Location: Rockville, MD
Posts: 96
87 420 Defroster Switch Shows ON All The Time

On my 87 420, the rear window defroster switch is lit up (as though the defroster is ON) all the time. I changed/pulled the fuses and even pulled the relay and the switch is still on all the time. When I flip the switch on and off, the interior lights dim very slightly so it seems the switch is functional turning the defroster on and off but I just can't get the bright "your rear defroster is on" indication to go off. Does this sound like a bad switch or a short somewhere else?



87 420SEL
00 C230K
00 A4 2.8Q
86 Masi Gran Criterium
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Old 07-02-2003, 02:39 AM
Senior Member
Join Date: Mar 2001
Location: Accokeek, MD
Posts: 683
Sounds like it has something to do with the switch itself... in relation to turning the bulb off and on. I'd open things up and have a look.

1993 190E 2.3
2000 Toyota 4x4 Tundra
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