headlights will not switch on, but flash when alarm is activate. Mercedes 300E

1988 MERCEDES BENZ 300E
150,000 MILES • AUTOMATIC
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SABBY3667
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I replaced the fuses and the bulbs must be good but the headlights will not go on when I turn on the switch. If I leave a door open slightly them use key to lock via driver door then you try to open door the headlights flash. ( sets off alarm). there seems to be 2 fuse boxes is one for the alarm, and could that be the problem. Or am I looking at a big electrical issue.
Feb 18, 2014 at 10:43 PM
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KNOWLEDGE IS POWER
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you need to determine if you've got power to the headlight switch, and then if its coming out. a simple test light will do this. while youre at it id check ALL the fuses. german cars tend to run circuits in conjuction with others.
Feb 20, 2014 at 6:09 PM
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SABBY3667
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running lights work with switch but headlights will not go on with switch. Already changed the fuses for the headlights. I would assume the bulbs are working since they flash on and off when the alarm is triggered. Any other advice.
Feb 20, 2014 at 9:05 PM
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KNOWLEDGE IS POWER
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the headlights do work, youre right there. im sending a diagram I found. tell me if it helps isolate the circuit. im leaning towards a bad headlight switch myself
Feb 21, 2014 at 2:56 PM