Question about 2003 Chevrolet Cavalier

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CAR ONLY HAS 6 VOLTS GOING TO FUEL PUMP INSTEAD OF 12 VOLTS

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The pump may only be rated at 6 volts,not all systems in the car are 12 volts.

Posted on Apr 09, 2011

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2000 Pontiac Grand am Replaced fuel pump today. Nothing no fuel pressure when I crank it. I check volts at the fuel pump plug in I get 4.9 volts. Shouldn't it be 12 volts. Can someone answer this.


yes. It should be 12 volts. Did you use the replacement harness you should have gotten with the pump? GM has an issue with the harness going bad at the pump that's why new pumps come with a new harness. Also check the relay.

Oct 13, 2016 | 2000 Pontiac Grand Am SE

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30amp auto shutdown fuse blows is it alternater


The ASD relay supplies battery voltage (12+ volts) to the fuel injectors and ignition coil(s). With certain emissions packages it also supplies 12-volts to the oxygen sensor heating elements. The Fuel Pump Relay is a separate relay controlled by the ASD relay input to the PCM. Fuse #12 (10amp) provides 12 volts to the coil side of both the relays and the ignition switch. Fuse #6 (30 amps) supplies 12 volts to the output side of the relay. Fuse #16 (15 amp) from the relay output to the Oxygen Sensors and Fuse #26 (15 amp) relay output to the PCM. Fuse #24 (20 amp) is Fuel pump relay output to fuel pump. Fuse #19 (10 amp) supplies 12 volts direct to the PCM.
look for burned or melted wires in the offending circuit.
sounds like you wiggled a wire while installing new relay.

Mar 06, 2013 | Cars & Trucks

1 Answer

No fuel coming to the fuel rail. is it a relay, or fuel pump problem


  1. Check the power going to the fuel pump. If it gets around 12 volts when the key is turned to the On position, replace the fuel pump.
  2. If the fuel pump is not getting around 12 volts, check and replace the fuse for the fuel pump.
  3. If the fuse is fine, replace the relay for the fuel pump.

Feb 18, 2011 | 1994 Mitsubishi Expo

1 Answer

Fuel pump not coming on,installed new one, white plug that has a yellow wire has 5 volts and ground is ok the 2 wires in the center shows 0


The plug you are referring to is probably the fuel tank pressure sender not the fuel pump. It would be plugged into a black sensor about 2 inches long pushed into a rubber grommet on the fuel bung. The fuel pump connector would have more that 2 wires going to it. most likely a heavy purple wire would be the power to the pump. It has to have 12 volts to it to work. The sender may have 3 wires, 5 volts, ground, and sense. the pump connector would have 12 volts, ground and 5 volts for the fuel gauge sender down in the tank.
If the 12 volts is not there, check the fuel pump relay. it is usually up on the drivers side firewall.
With the key in the on position without starting the engine, you should have 12 volts to the pump for 3 seconds then it will click off. Without cranking the engine you should be able to locate the relay by the clicking sound.
There is also the obvious, like checking the fuel pump fuse.

Jan 11, 2011 | 2003 Chevrolet Avalanche

1 Answer

Have a 2001 fiat punto..was running then just cut out...got spark no fuel pressure ...have located the fuel pump....4 wires going to pump...on 1 of the wires on ignition its 12 volts but when you crank it...


Have you had the fuel pump output pressure checked....Sounds as if it could be defective.....Pressure should be above 3 .6 bar Or maybe check your battery condition, that may be the problem, but more likely the pump....
Regards Johngee10

Oct 29, 2010 | Fiat 500 Cars & Trucks

2 Answers

We replaced the fuel pump on our 2001 chey 1500 4.8 and the fuel pump still will not come on and there is power getting to the fuel pump but the fuel pump wont come on


POWER GOING TO FUEL PUMP NOT TO FUEL PUMP.YOU CAN BUY AND REPLACE FUEL PUMP WIRES SEPERATELY.SOUND LIKE OLD WIRES HAS A OPEN CIRCUIT OR POOR GROUND.

Oct 01, 2010 | 2001 Chevrolet Silverado 1500

3 Answers

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

1 Answer

02 yukon died on freeway electric problem or fuel


When you said checked the fuel filter, did you mean changed the filter?? And does the Battery hold 12 volts?? Check the battery to make sure it has 12 volts. If you have a second car, take the alternator off and bring it to a auto parts store like Auto Zone and they can test it free of charge and battery too. Change the fuel filter, if both are good then check all the fuses and relay, Pay attention to the fuel pump fuse and ECM fuse. If everything has is good then it's going to be a bad fuel pump, which is located in the gas tank. That requires to dropping the tank to get to the fuel pump. Good luck and hope this helps.

Jun 14, 2009 | 1989 Buick Regal

1 Answer

Fuel pump only getting 6 volts,2001 grand marquis?


the cances are that the fuel pump relay is faulty,
and not passing the right current

Dec 16, 2008 | 1996 Mercury Grand Marquis

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