Here is the diagram for your car. Best thing to do is, when it is not working start poking around with a test light and DVM to troubleshoot the circuits. Ground locations are listed in the diagram.
Good luck,

-Jim

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97' SL600 Sport Pano - Silver
90' 300e 2.6 - Silver Donated to a family member
95' C280 - Artic White
88' 924s - Guards Red Sold
98' Durango SLT - Silver
93' 740i Tripple Black Sold
95' 900s Conv - Red
96' XJ6 - Black - For Sale
95' 325i Convertible - Montreal Blue My Project Car