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Old 10-15-2003, 11:42 AM
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Mercedes Maniac Mercedes Maniac is offline
Join Date: Jun 2003
Location: Colorado
Posts: 32
Night time illumination of defroster switch is fiber optic which is fed from an instrument panel light. Defroster ops indication is electrical. On the back of the switch, pin # 31 is the ground for the light, this ground may be connected to the hazard flasher switch ground wire. Feed back power to the switch from ( or to ) the combo relay is through pin# E and/or #A. A & E are not directly connected to the window element ( pin 87 or 07 is ). Combo relay pins #A & #E are wired to pins #A &#E on the switch. Check for voltage at the rear window element.
'87 190E 2.3-16
Heated Seats, Graphite Dash,
Delsing shift bushings
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