Hi all --

I did a search but did not find a conclusive answer to my problem.

The Symptoms
Just today in my 1999 W202 (C43), my turn signals (left and right) did not come on when I moved the stalk to indicate a turn. At the same time, neither the winshield wipers nor the winshield washer fluid came on when I turned or pushed the control stalk. I also tried the horn and it did not work. Strangely, when I pulled the light switch out to turn on the fog lights, neither they nor the led in the center of the light switch came on. However, the highbeams and the blue indicator light on the gauge panel did work.

About 30 minutes later the turn signals and winshield washers started working normally again, I didn't try the horn, and the fog lights came on but the led in the center of the light switch did not come on.

What could be the problem? I truely need help with this one.

Previous posts here and a Club202.com indicated that this problem may be caused by a faulty voltage regulator (on back of alternator), a bad wiring harness or a bad master relay. None of those posts gave the final solution to or the exact cause of the problem.

Any help would be appreciated.

Thanks,

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Marc
C55: Evosport headers & UDP's; AMS crank; TVT thermo; phenolic spacers; Denso IK16's; EuroTech ECU; RennTech cf airbox w/ Green filters; Z06 catch can; Sprintbooster; Optima RedTop; Quaife LSD; AMG: shift paddles, 030 rear calipers & rotors; Rotera brake lines; Euroteck CF lip; "C63" rear diffuser; 18" SLK AMG Turbines (summer); 18" OZ Superleggera's (winter); K40 dual f&r radar w/ laser jammers; MB: digital climate control, iPod kit & mp3 CD changer; iTronic B/T for MOST.

That's a tough one. What is the status right now? Is everything working, or just the foglight indicator is inop or????
My gut reaction would be the ignition switch (EIS). There may be fault codes stored to look at. The EIS would require a shop to do it that has SDS, and possibly only a dealer.

Gilly

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Would follow-up whatever Gilly suggests, he's the pro. However, by the way, a "bad wiring harness" can sometimes just mean a bad ground. Sometimes it's simply a matter of regrounding that part of the wiring system (for example, a grounding point somewhere that's gone bad and regrounding the questionable components to another new ground).

I'd also check the fuses for the indicators going bad (turn signal, etc) to see if one is going bad and cutting-power intermittently.

Ditto on the fuses. Twist the fuse in its socket to break any corrosion causing intermittent contact.

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95 E320 Cabriolet, 169K

I am having a problem with the delay on my wipers (I have already replaced the motor). It has been suggested that the problem is the combination relay. When this was mentioned the comment was made that the problem usually effects other items at the same time (like the blinkers and other items on the steering column). If you can find someone else with the same model car you may want to check this out as an option (make sure you verify the part # also).

Good luck!

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1994 E320 Cab (mine)
2001 Chevy Suburban (wife's)
1995 BMW M3 (son's)
1989 Volvo 740 GL (extra car--for sale)

Tump,
Was the engine area WASHED or cleaned just before the problem started?
They can get wet when washing the engine as fuse box ISN'T sealed that well.

That car has a signal activation module (SAM) that controls all of those functions, codes may be present in that module.

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