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M20
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4,818 Posts
Discussion Starter #1
had a bulb out error and pointed to the front RH parking light bulb. checked the bulb and it works. Replaced the bulb anyway still didnt work. Checked the connectors with a voltmeter and its only giving out 4V. Any reason why this is?

may be relevant info:
99 SL500
just replaced the headlight switch with a brand new genuine unit a month ago
 

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1993 Sl 500
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461 Posts
It may be an earth fault. See if you have voltage on the earth connector, if you do try running a temporary earth and see if you get 12 volts at the feed.
 

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dark blue 1992 500 sl
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17 Posts
i had same problem tried all finaly fixed by changing lighting relay not new as no longer available
 

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dark blue 1992 500 sl
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17 Posts
remove 6 screws from fuse board relay below see pelican parts web site for directions
nb 1992 500sl rhd
 
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