Head light intermittent issues - Mercedes-Benz Forum
 
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post #1 of 7 (permalink) Old 11-13-2015, 03:57 PM Thread Starter
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Head light intermittent issues

Hello everyone,
My daughter has a 1989 300sel Inline 6. It appears she has an intermittent problem with her head lights on one side going out. I examined the bulbs(with gloves) and found no problems. When tracing the wiring I found something interesting. At a spliced connection point it appeared to be burnt and when i wiggled them the lights would work again. The wires also felt warm to the touch. Is this normal? I will send picks tomorrow morning of the burnt sections.
PS: I am missing the internal round cover for one of the bulbs. Where can I find one of these? All the ones I see on Ebay are square.

Anthony Clark, BSEE
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post #2 of 7 (permalink) Old 11-13-2015, 05:09 PM
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Redo and solder the wires (you didn't say what kind of connection was there)

Some days it's just not worth chewing through the restraints
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My Stable:
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'91 300SE (sold) "Sadie"
'11 Suzuki SX4 Sport Sedan
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'72 SeaBird boat, "Riff Raft", overhaul restarted

Dif-tor heh smusma
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I'm surprised that NOBODY has asked me what this is / means
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LOL
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post #3 of 7 (permalink) Old 11-13-2015, 06:06 PM Thread Starter
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Its 4 wires with molex terminals with shrink tube on them

Anthony Clark, BSEE
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post #4 of 7 (permalink) Old 11-14-2015, 07:00 AM
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Also, there are four white fuses in the fuse box for each headlight filament. Make sure they are brass fuses, not the white metal (e.g., aluminum, lead) ones. That won't fix your wiring problem, but *will* alleviate problems later.

Blasphemous Mike
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post #5 of 7 (permalink) Old 11-22-2015, 08:19 AM Thread Starter
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Quote:
Originally Posted by mramay View Post
Also, there are four white fuses in the fuse box for each headlight filament. Make sure they are brass fuses, not the white metal (e.g., aluminum, lead) ones. That won't fix your wiring problem, but *will* alleviate problems later.
I replaced all fuses with new ones a year ago. They looked pretty rough and it was a cheap item to replace. But I still am wondering about the wires being hot. Is this normal??

Anthony Clark, BSEE
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post #6 of 7 (permalink) Old 11-22-2015, 11:11 PM
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They'll be warm because you have a poor connection. Fix it and I believe the heat will lessen.


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post #7 of 7 (permalink) Old 11-23-2015, 01:15 PM
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I'd also remove, clean, and reattach the ground at that headlight. I believe it's right there near the radiator next to the headlight.
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