Question about 2001 Mercedes-Benz C-Class

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No power to the fuel pump.

Unable to find fuse or relay. I ran 12 volts to the pump. did not run wires got hot

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Sounds like a shorted motor.

Posted on Dec 31, 2013

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No fuel coming out of the line at the carb.


Sounds like you need to change the pump. If battery power doesn't make it work, it must have burned out. How old is the pump? It must be pretty old to still have a carburetor. Even throttle body injection that looks like a carburetor would make it pretty old?

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Tiffany - -I don't know when you first posted this question, but I am seeing it for the first time at 3:30pm on Wednesday.
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2000 chevy silverado 1500 4.8 4wd will not start


Your pump is controlled by the pcm using a 12 volt signal to the relay. Pull out the relay and probe the relay socket with a voltmeter. There should be 2 terminals with 12 volts when the key is on. With the key off, there should be one 12 volt terminal coming from the ecm b fuse. See top left of diagram below.
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There is a red and white wire feeding the fuel pump relay from a 30 amp fuse. Both the shutdown relay and the fuel pump relay are grounded by the PCM, so if the fuel pump relay is grounded it should be "on" and providing a direct link from the pump to that fuse.
You should have battery voltage on that 30 amp wire before the relay and then on the dark green and black wire going to the pump.
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Jun 24, 2012 | Cars & Trucks

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99 chevy s10 replaced fuel pump but the new one is not getting power i ran a hot wire to the pump and it comes on in the tank so i know the pump works.i replaced the relay under the hood that said fuel...


It sounds like you are on the right track. Here are the basics for your pump. I took a guess at the engine size and went with a 4.3 V6, Hopefully that is it.

1. There is an ECM B fuse, 20amp that feeds one side of the relay.
2. You have already mentioned the relay. The other side of the relay feeds from the VCM or Vehicle control module.

Remove your relay and check pin #3.. You should have 12volts with key on. If not check the ECM B fuse.
If you cross pin#3 and #5 on at the relay location you should feed 12 volts to your pump and it should run. If it does not, look for a ground problem on the black pump wire or a broken wire between the relay and the pump. I show a gray power wire to the pump.

Hope this helps.. Best of Luck..

Aug 21, 2011 | Chevrolet S 10 Cars & Trucks

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I am not getting a signal to my fuel pump, fuel pump relay nor the 10 amp fuel pump relay fuse. I have checked my wiring from the ECM to the FPR and it is good. Where does the power come from through the...


The fuel pump relay is powered by a fusible link connected to the starter solenoid on the positive battery terminal. That fusible link feeds the 10 amp fuse near the relay. You can test the fusible links with a 12 volt test lamp. If the fusible link test okay check for an open circuit in the wire between the link and the 10 amp fuse. Hope this gets you fixed.

Jul 01, 2011 | 1987 Chevrolet Corvette

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2000 grand am. replaced relay, fuse, and fuel pump. still is not getting fuel to fuel rail. 5 volts is present at fuel pump but not 12 volts to run pump. reset passlock.....still do not have 12 volts at...


Pull the relay and make sure you have 12 volts there. Pin # 30 is the power to the pump. this will tell you which way you have to go to find a short or corrosion in the wires. let me know
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Nov 27, 2010 | Pontiac Grand Am Cars & Trucks

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No power to fuel pump car was running fine just quit repalced fuel pump no power to pump, car will start when spraying starting fluid in to intake, is there a fuse ? also replaced ECM, fuel filter,...


Check for 12 volts power at the fuel pump harness. If no power is going to the pump, check the fuel pump relay. Also, check the fuel pump inertia switch. Ford usually has it on either inside left or right rear trunk fenders.

Apr 09, 2010 | 1987 Ford Taurus

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On my 1994 plymouth voyager the 3 wire harness to fuel pump (blue wire) doesn't have 12 volts; should it? fuel pump quit then worked once when hot-wired with 12 volts. fuse and relay is good.


The wire should not be hot until the relay is triggered. The relay does not get triggered until the ignition key is turned on. It will run for 3-5 seconds or until the system pressure it at max.

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