Tip & How-To about Chevrolet 2011 Chevrolet Express 2500 Work Van

2011 chevy express intermittent no start dies while drivig


after installing a new fuel pump and relay with no success, i verified that the power from the fuel pump relay was not making it to the pump. i traced it back to underneath the fuse box which is under the master cylinder. after removing the fuse box from the plastic bracket i unscrewed the 10mm bolt to realese the connector nearest the engine and found the terminal on the gray wire was melted. my fix was to cut that wire at the connector and installing an in line fuse that i was able to plug into where the original fuel pump fuse was. good luck if your having a similiar problem, hope i helped you. sorry for such a bad picture :(

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no power to fuel pump. replaced relay still nothing


You need to trace the power source, and not only the relay. Check the voltage of cable/contact points of relay while your turn on ignition. If you don't have a voltage tester, you can use the bulb to verify the presence of power.

Nov 03, 2010 | 1997 Acura RL

1 Answer

no power going the fuel pump on 1991 honda accord what should i do


If you have verified a no power condition by pulling the tank and measuring the power signal to the pump then either your fuel pump relay is bad, or you have a bad fuse, or a broken wire somewhere in between.

My guess is that the fuel pump no longer comes on when you turn the key to the on position and that you havent dropped the tank to inspect the pump yes? If this is so you may have a bad fuel pump as well. What I would do is check the fuses for the fuel pump and make sure they are not blown. Then I would check out the relay, visually inspect it, the top should come off of it, look for any burnt wire traces and components inside the relay, you may be surprised to find other relays in your car are the same as the fuel pump relay. Swap one of those out with the fuel pump relay and see if that fixes the problem, this will save you the money of buying a new relay before you know it is your problem. If the relay appears good then you may have to drop the tank and install a new pump. Some vehicles have harnesses under the hood which allow you to feed power directly to the fuel pump so you can test it to make sure it is good before you drop the tank. Some don't. You can feed power directly to the fuel pump by jumping the pins on the relay, I am not familiar with the pinout on your cars relay however and could not advise you which pins to jump to feed power directly to the pump. Get a chiltens or haynes manual, they should have wiring diagrams in them.

Apr 10, 2010 | 1991 Honda Accord

1 Answer

2000 S10 4.3L Fuel pump stopped working out of the blue. We Put a new Fuel Pump in, new harnes to fuel pump, new fuel filter, new relay, new fuses in IGN C and ECM B fuses. Still the pump will not turn on. We traced the wires and found that the gray wire to the pump is not getting power. Float on pump is working but not the pump itself. We traced it to the fuse box under the hood and tested it the and still no power. Double checked the fuses, Can feel the Relay clicking when key is turned on. Please Help. Ran out of Ideas of what to do. Name is Jon.


Did you verify that the relay terminals have the appropriate signals to them? 

ECM fuse B (20-amp) should provide power at all times to the orange wire of the fuel pump relay. The relay coil receives ground via the black wire, and relay coil gets power from the dark green/white wire. When the relay is closed, you should have battery power on the gray wire. 

The relay trigger wire should have power from the dark green/white wire in terminal 1 of the Vehicle Control Module (VCM) connector for the first couple of seconds after they key is turned to run (to prime the system) and when the truck is running. Checking for all the appropriate signals at the relay is where I would start. That is after I checked for diagnostic codes.

Believe the fuel relay is the middle relay out of the three in the left rear of the glove box. Last thing is to hot wire the fuel pump if you can not get it scanned, see if the pump is bad unless your going to have a shop work on changing the fuel pump.
Good luck and hope this helps. keep me posted.

May 06, 2009 | 1999 GMC Safari

1 Answer

Fuel pump will not run, 96 Neon 2.0 SOHC


Personally I wouldnt bother tracing the wire as it is probably not worth your time, and just run a constant 12v from the battery to the relay on like 10ga wire. There is probably a short somewhere in the system which can be a real headache to find.

Also it may sound dumb, but check your fuses, and the fusible links under the hood. Chances are that they are all fine though, especially if you have dash lights.

Dec 30, 2008 | 1996 Dodge Neon

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