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  #1  
Old 11-10-2012, 04:37 PM
Ron59b
 
Join Date: Aug 2007
Location: Richmond, Virginia
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1986 Mercedes 300 SDL Fuse box labels?????

Good evening everyone

I have a 1986 300 SDL with 280,000 miles, and it has a drain on the battery. I used the information here on the forum to identify the troubled fuse circuits causing the drain. I have been successful in identifying it. The total drain was 11-12 milli - amps. On fuse #14 accounted for about 10 milliamps and fuse number #2 for 2 - milliamps. I do not have the printed card that identifies which items are controlled but which fuse. Can someone tell me what these fuses operate? OR could someone also send me a listing of the fuse layout?

Any other suggestions related to these circuits would be helpful. I've temporally removed the identified fuses.

Thanks

Ron Brown
Richmond, VA
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  #2  
Old 11-10-2012, 05:02 PM
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Quote:
Originally Posted by ron59b View Post
I have been successful in identifying it. The total drain was 11-12 milli - amps. On fuse #14 accounted for about 10 milliamps and fuse number #2 for 2 - milliamps.
This level of current is insufficient to drain a properly functioning battery in less than two weeks.

The general level of acceptability for current "leaks" is 50 milliamps. If you are below that value, you don't have an issue.

That being said, if the battery is well below par, you might not make it more than a couple of days.
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  #3  
Old 11-10-2012, 05:16 PM
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Location: Carlsbad, CA
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86 SDL Fuse Box Legend

First send me a pm with your email address & I'll send a photo of my legend that you can print and install into your box.

Second...follow BC's advice...although a littel cold sometimes lol...he generally knows what he's talking about
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  #4  
Old 11-10-2012, 10:14 PM
Ron59b
 
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Location: Richmond, Virginia
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Thanks to you both for your response. BC the battery may very well be sub-par. I am planning to replace it soon.

Ron
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  #5  
Old 12-03-2012, 06:49 PM
Ron59b
 
Join Date: Aug 2007
Location: Richmond, Virginia
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Here is the update guys.....

I checked out the fuse issue and it appears to be the #14 and 2 fuses. I removed them both and have no more of a drain. The questions I now have is that the #14 fuse controls the (Left) High Beam. I was told it is probably a stuck relay. Once I took the fuse out, the fog lights will now work. I believe that this confirms the high beam issue.

What is the a part number for both the "L & R" High Beam Relay? Where is it located? I need to identify it to replace it. The #2 fuse controls the hazard lights, front roof light, clock, electronic radio, vanity mirror, and the electric illumination control. THe dome light at the sunroof isn't working, So I kind of suspect it first.

Any help would be greatly appreciated...

Thanks

Ron
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Old 12-03-2012, 07:29 PM
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I was told it is probably a stuck relay.
...........who told you that?
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Old 12-03-2012, 07:48 PM
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11 milliamps could simply be the clock and radio...
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Old 12-03-2012, 07:52 PM
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11 milliamps could simply be the clock and radio...
Yes, that's on fuse 2.
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  #9  
Old 12-03-2012, 08:05 PM
Ron59b
 
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When I did the check on the milliamps, #14 was the one with about 9-10 milliamps. The fuse #2 was between 1-2 milliamps. I have since replaced the battery yesterday. I knew the old one was in it when I purchased the car.
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Old 12-03-2012, 08:08 PM
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When I did the check on the milliamps, #14 was the one with about 9-10 milliamps. The fuse #2 was between 1-2 milliamps. I have since replaced the battery yesterday. I knew the old one was in it when I purchased the car.
14 does provide power for the LF high beam. However, 10 milliamps isn't really a concern. It might be leaking via a connector or via the external lamp monitoring unit.
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  #11  
Old 12-03-2012, 08:19 PM
Ron59b
 
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How do I check that? Where is that located? Remember that I mentioned that the fog lights did not work until i removed the two fuses. Now the fog lights work.
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