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#1
10-09-2008, 11:16 PM
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W124 low beam headlight out
On my '86 300E, the low beam on driver's side is out; high beam works ok. Bulb is good (swapped with other side to check); replaced all headlight fuses. So I suspect the connector. Does anyone know the voltage and resistance values for the three terminals on the connector?
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#2
10-10-2008, 11:29 AM
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Well, one should be ground, and the other two should show battery / buss voltage when selected [or both will when you have the low beams on and pull back for the 'flash to pass' on the stalk]
Today's lunchtime project is replacing a failed crimp connector the previous owner used on my car so my left low beam will work. [at least he didn't use wire nuts like he did on the stereo install]
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#3
10-10-2008, 03:25 PM
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I get battery voltage at the center (yellow wire) terminal, which feeds the high beam light. But at the outer (white wire) terminal I get only 0.14 volts. I tapped into that white wire before it entered the socket connector and got this same value. So I guess something is interrupting the current down the white wire. I'm at a loss how to go back in the system from there, however.
Thanks for your tip and I hope crimping solves your problem.
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#4
10-11-2008, 02:05 PM
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Low beam is back on! Turns out it was a fuse after all. But not the one you'd expect. When I did the first workthrough I changed out all the four light fuses. The culprit fuse was for the left HIGH beam, not the low beam light that was actually out. I didn't see a small crack in the replacement fuse, but it showed up when I was jiggling everything once again. Why replacing the high beam fuse would make the low beam light operate I can't explain. The high beams operated normally through all this.
Thanks for your suggestions. Bob
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