s320 cdi fuse keeps blowing - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 11-17-2008, 12:32 PM Thread Starter
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Question s320 cdi fuse keeps blowing

hello thanks in advance for any help
i have a fuse in the fuse box under bonnet thats keeps poping 7.5a problem being i dont have the diagram to tell me what it is? car goes into lhm can go at any time no specific driving condition on tick over driving ect?? has any one access or a knolage of a download describing which fuse does what to give me some idea of what i will be looking for
2001 s320cdi
again any help would be much appreciated infact a life saver
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post #2 of 6 (permalink) Old 11-18-2008, 07:02 PM
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Use search for "fuse chart", this has been asked several times and there are far too many fuses to describe each one here. Also you need to be more specific about the fuse number, and location (there are two fuse/relay boxes under teh hood even).

If a fuse blows every now and then, it usually signs that some electrical device is failing as it draws more current than expected. Or a wire is damaged, occasionally causing a short circuit which blows the fuse.

Are you sure you do not have a paper format fuse chart in the tool box located with your spare tire, it should be there?

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post #3 of 6 (permalink) Old 11-19-2008, 10:21 AM Thread Starter
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hello no the fuse diagram isnt in the car spent hours looking in every place poss
its the box on drivers side close to the screen the fuse isnt numbered nor is the lid giving any idea as to what it actually is but on tracing it back it would apeer to be feeding a live to the cdi unit(ecu)?im stumpted with out knowing what it feeds i don't know where to start?
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post #4 of 6 (permalink) Old 11-25-2008, 11:47 AM
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Perhaps this will help. This is for a 2001 W220 chassis which does show fuse sizes and what they are for. You must open it with an editor so you can Zoom in to at least 200% then you can see it much better
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post #5 of 6 (permalink) Old 11-25-2008, 12:13 PM
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I also noticed, that if it is Fuse 6 (F6) it is also interconnected with fuse 41 (F41) which is located on the other fender of the car. F 41 is a 20a fuse. IF that fuse (20a) is blown, that would explain the 7.5a fuse blowing becuase it is trying to support a 20a surge by itself. Some of the fuses are connected in tandem based on this diagram. Be careful and get alot of fuses!!! I know this diagram works for my 2002 S500 so it should be pretty close for your needs.
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post #6 of 6 (permalink) Old 11-25-2008, 12:43 PM Thread Starter
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hello again thanks for the diagram turns out that the fuse is linked to the inlet manifold shutter motor which is not jamed but is drawing to much ampage hence fuse blowing
have disconected the motor and held the flaps open with a tie rap car doesnt run perfect but doesn,t go in to limp mode or blow the fuse so untill i get hold of a new one all is good thanks again for the help will keep you updated on progress
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