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Old 09-04-2010, 11:36 AM
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crhenkel crhenkel is offline
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Join Date: Mar 2001
Location: Decatur, Illinois, USA
Posts: 616
wiring diagram

Got out the wiring diagram book during breakfast. Looked up the charging warning lamp. Looks like the current for the blue/white wire to the alternator stator passes right through the 2 watt bulb for the charging warning lamp. I changed out all the warning lamps with led bulbs. Easier to see and notice during the day and a nice bright clean colorful light as opposed tot he washed out color of the OEM bulbs. Only problem is it looks like the super low resistance of the LED bulbs and low draw has droped the needed juice to make the voltage regulator control the charging fuction properly. Was to go! SO, going to reinstall the OEM bulb and see what happens this morning. Wiring diagram seems to support the theory. We shall see.

Just as a note, it also looks as if the current coming out of the bulb for the charge warning lamp goes to the ABS control unit.
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Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red
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