SL/SLC-Class (R107) 1971-1989 : 250SL, 280SL, 450 SL, 380 SLC, 450 SL, 380 SL, 560 SL

SL/R107: Curious about voltage

Old Sep 8, 2015 | 11:37 AM
  #1  
caperss's Avatar
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From: Massachusetts
2010 S550 4Matic, 88 560SL, 2002 Boxster, 2005 Jaguar Super V8
Curious about voltage

Before I start looking for my SRS problem I wanted to check first that my alternator was making enough voltage. With the high beams on and at idle I am reading 14 volts at the battery. Is this a high reading? I was expecting about 13.25 volts. If high what would be the best thing to check?
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Old Sep 9, 2015 | 02:41 PM
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myway's Avatar
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450SL
Normal. I get 14-14.5 with accessories off.
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Old Sep 9, 2015 | 03:00 PM
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caperss's Avatar
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From: Massachusetts
2010 S550 4Matic, 88 560SL, 2002 Boxster, 2005 Jaguar Super V8
Thank you MYWAY! That helps. So I don't have low or high voltage now I can start looking for the cause of my constant SRS lamp. I pulled the codes and it was pointing to RH Seat buckle, AIR bag and low voltage circuit 15. I will check under the passenger seat for the buckle connection clean it up and reseat it with fingers crossed. PO replaced the interior he may have not connected this or it could be loose. I am hoping. Thanks again!
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Old Sep 9, 2015 | 11:11 PM
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1998 SL500, 2007 C280 4m
Same here...

Originally Posted by caperss
Thank you MYWAY! That helps. So I don't have low or high voltage now I can start looking for the cause of my constant SRS lamp. I pulled the codes and it was pointing to RH Seat buckle, AIR bag and low voltage circuit 15. I will check under the passenger seat for the buckle connection clean it up and reseat it with fingers crossed. PO replaced the interior he may have not connected this or it could be loose. I am hoping. Thanks again!
The SRS lamp on my 07 C280 came on yesterday and a look at the codes indicated exactly what you are seeing. Please let me know what you find. Thanks.
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