S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Main engine harness

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Old 09-23-2021, 08:23 PM
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S550
Main engine harness

Hello everyone. I recently performed an intake throttle tumbler repair myself which involved removing the main engine wiring harness as well as the fuel rail.

I believe a little bit of fuel got on the harness and I heard a spark. Now I have no power in the harness on the right side (facing the car) and I’m getting a P0010 error and it cranks then dies.

I tested each one of the connectors on that side and none of them have power. I have power on the left side however. Does this harness run off of a fuse or relay? Or do I need to get a new harness altogether? Thanks in advance
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chassis (09-23-2021)
Old 09-23-2021, 08:56 PM
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2017 GLE350 4MATIC
Diagnostic tools that will help you solve the problem:

- WIS/ASRA/EPC eBay for about $15
- paper folded up fuse diagram in one of the fuse boxes of your car
- XENTRY which can be obtained by using the search feature on this site

Not having these tools will increase the time and effort to solve many times over.

A multimeter and OBD scan tool are the barest minimum for this job.
Old 09-25-2021, 11:47 AM
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S350 2008
There are a fuse 15A in front SAM supply power for right engine ECU harness
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Old 09-25-2021, 12:02 PM
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S550
Fuse


Do you know which one it is? None of my 15’s are blown
Old 09-25-2021, 12:53 PM
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Have you removed and carefully inspected each and every fuse in each and every fuse box?
Old 09-25-2021, 01:00 PM
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S550
Harness

Just the front SAM and PreFuse box on the other side

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