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  #1  
Old 01-29-2019, 05:38 AM
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Join Date: Jun 2008
Posts: 468
Auxiliary Water Pump Can Destroy CCU or Even Car?

Hey guys,



The auxiliary water pump on my 81 380sl hasn't been working, so I just picked one up on Ebay. However, I learned from several threads on these pumps that, if the pump seizes and draws too much current, it could destroy the CCU or even the car, as it did in this thread:


I lost it all....electrical fire high up in the dash


So, I'm hesitant to install it without first putting a 1 amp fuse on the power wire out.


Can anybody tell me if that problem affected the 81 380sl and, if so, is it caused by particular pumps, the car's circuitry, or both.

Thanks very much in advance.
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1981 380SL
Chassis: R107.045
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  #2  
Old 01-30-2019, 05:37 AM
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FYI, my question was answered in the following shop forum thread:

Auxiliary Water Pump Can Destroy CCU or Even Car?
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1981 380SL
Chassis: R107.045
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  #3  
Old 01-31-2019, 12:16 PM
okyoureabeast's Avatar
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Join Date: Jul 2009
Location: North America
Posts: 1,580
Yes it can.

The aux pump can be safely bypassed or unplugged altogether. It's not really necessary.
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Quote:
Originally Posted by Yak View Post
Going back to the original post: "Can you get the vac to blow instead?" No. Vacuums are low pressure so they by nature "suck" and nature abhors them.
1984 380SL
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