Question about 1999 Chevrolet Blazer

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No fuel pump power. Checked relays, ECM fuse. Wouldn't work first thing yesterday morning, then did in the evening. Worked first thing this morning then not afternoon. Getting alot about the grounds from fuelpump to crossmember gusett. Does this sound right?

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Youre fuel pump is burnt replace it

Posted on Jul 22, 2009

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2 Answers

After bypassing the fuel pump relay, the ECM and IGN have no power. Car will not run. What is the cause?


diagnostic connector gets it power from the cig. lighter fuse change fuse and then you should have power at the connector check the ecm fuse also

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My 97 monte carlo will turn over but there isn't any power to fuel pump I know it works and I've changed all the fuses and relays and also got the key checked.... I don't get it also checked...


The ECM BAT fuse powers the fuel pump through the relay. If the gray wire has power and the black wire has ground, and the fuel pump does not operate, its bad.

Aug 29, 2011 | 1997 Chevrolet Monte Carlo

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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.

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Starter works, turns over, but there is no spark from the plugs and the gas line has no pressure, fuel pump not even kicking on. However all other electical such as wipers, lights, horn ect. work. what...


SOUND LIKE FUEL PUMP RELAY FAULTY IT SENDS POWER TO ASD OR AUTO SHUT DOWN RELAY AND FUEL PUMP WHICH LOCATED IN THE POWER DISTRIBUTION CENTER UNDER THE HOOD IN THE ENGINE COMPARTMENT.

Nov 14, 2010 | 1994 Plymouth Voyager

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2003 sonoma, 4.3. ran fine, one morning tried to start, heard a pop" not in the motor" would turn over but not start, fuel pump made no sound in "on" postion or when starter was bumped....


There is nothing in the circuit after the relay, however, hearing the relay doesn't mean the power is available to run the pump, as the pump circuit is separate from the relay solenoid. The pump needs power from the 20 amp "ECM B" fuse. If you probe the relay socket with a test light, there should be 2 hot terminals--one from the PCM and one from the ECM B fuse. See diagram below.


If the power is there, are you sure it's the fuel pump relay that you hear clicking? If there are other relays in the box, it may be one of them that's coming on. Try swapping the pump relay with another one. Let me know if you get stuck or have more questions.

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Jul 07, 2009 | 1995 Nissan Pathfinder

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....


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.
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1 Answer

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you might check the fuse for the fuel pump and the fel pump relay...either could be blown

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