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No power goes out to the fuel pump

Tiny
EWIN
  • MEMBER
  • 2001 MERCEDES BENZ C320
  • 145,673 MILES
What might be the problem with my 2001 mercedes benz c320. I get power to the fuel pump relay and fuse in trunk but no power goes out to the fuel pump?

i used my test light to see if it geting any power
Friday, May 11th, 2012 AT 3:41 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
There is a SAM control unit on the left side of the trunk that sounds like it has gone bad but to be sure here is a guide and a fuel pump wiring diagram to help you do some testing.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Please let us know what happens so it will help others.

Cheers, Ken
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Thursday, August 24th, 2017 AT 3:26 PM
Tiny
FUTURISTIC HENDRIXX
  • MEMBER
  • 1 POST
So what if the SAM control getting power, and not the fuel module line?
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Wednesday, June 12th, 2019 AT 7:30 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
Did you check the #3 fuse in the SAM control left side of trunk? If the fuse is good we need to see if the engine has spark because if it doesn't the SAM control will not turn the pump on. Here is a guide to help you check for spark:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please run down this guide and report back.
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Wednesday, June 12th, 2019 AT 12:29 PM

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