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Old 11-14-2002, 08:38 PM
420benz's Avatar
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Join Date: Jul 2001
Posts: 961
Electrical problem

I will try to explain this as best as possible:The electric miror on my 89 420 sel only workes in the up and down direction.I removed the glass and noticed two small motors.Both motor and mating gears are in good condition.So i removed the plug which has 5 contacts two on top which controles up and down and two on bottom of plug which controles rt. to lt. Off center is another contact which i believe is common.With a volt meter putting one leg on common and the other leg on one of the other contacts on the bottom of the plug and activating switch in one direction i get power,in the other direction no power.Moving leg to other contact and moving switch i get power in one direction and in other direction no power. I think this must be the working side of the switch. Doing the same thing on the top two contacts one contact is o.k but the other contact has power all the time [without activating the switch]. Is this normal or is there a short in the wires from the NEW switch to the mirror?

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Old 11-16-2002, 12:14 AM
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Old 11-16-2002, 01:19 AM
goldstone's Avatar
W126 Lover
Join Date: Oct 2002
Location: Dutchess County, New York
Posts: 158
Arrow Maybe this will help...

See if this wiring diagram helps any... Good luck!
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1991 560SEL-Euro (214,000 miles)
1989 420SEL (Retired from daily use at 325,000 miles; Use as donor vehicle)
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