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  #1  
Old 08-14-2015, 09:50 AM
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Join Date: Dec 2014
Location: Salt Lake City Utah
Posts: 37
what is the relay on top of k40?

1998 E300TD

k40 unit is PN A0005400172

there is a relay on the top left with PN A0025421319 what does that relay control?
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Old 08-14-2015, 10:57 AM
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
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https://www.google.com/search?q=A0025421319&sourceid=ie7&rls=com.microsoft:en-US:IE-Address&ie=&oe=&gws_rd=ssl

No electric fuel pump on that car of course. May control the SOV. Could pull it and see if the SOV fails to click open when the key hits position 2....may need to clear a code afterwards.
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Terry Allison
N. Calif. & S. of Key West

09' E320 Bluetec 77k
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  #3  
Old 08-16-2015, 06:25 PM
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Join Date: Dec 2014
Location: Salt Lake City Utah
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so during some experiments, I think I have concluded that the relay on the top of the K40 unit controls the starter. it will not crank over with it not in place.
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