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Does any know how to take the whole under the hood fuse block off of a 2000 chevy blazer..because im having problems with my fuel relay failing. So im assuming there is a short somewhere in the block.or one of the metal pieces or wires isnt touching the relay fuse. even put a new fuel pump in for 300 dollars. i had tried and under the block are bolts that just keeps turning.

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  • Cars & Trucks Master
  • 2,760 Answers

The bolt heads are under the front wheel innner fender plastic cover now be aware this is a common problem for the gm fuel pump and it usually falls to a wire harness fault around the gas tank

Posted on May 15, 2014

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  • Cars & Trucks Master
  • 2,430 Answers

I don't know of a fault in the fuse block, if there is I would by pass it with a inline fuse. Check the wiring from the relay to the fuel tank for a short to earth, the insulation may have rubbed through some place.

Posted on May 28, 2015

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Posted on Jan 02, 2017

mechanicm639
  • 253 Answers

SOURCE: 2000 S10 4.3L

At the fuel pump relay you should have 1 full time hot wire. 1 hot wire when you turn on the switch. 1 ground, and the other wire goes to the pump. Test the ground to be sure it is good. If so then jump a hot to the one that goes to the pump and see if it runs.If it does then you have a bad relay or ECM. You can swap the relay with another of the same # from tour fuse box to test it.There is also a ground on top of the frame near the filler neck, check it too. Good Luck

Posted on May 06, 2009

Molson02536
  • 3854 Answers

SOURCE: 2000 S10 4.3L

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.

Posted on May 12, 2009

  • 295 Answers

SOURCE: i keep blowing the fuse under the hood that

need a wire diagrahm. short to load but what kind of circuit?

Posted on Jul 08, 2009

  • 836 Answers

SOURCE: I'M HAVING FUEL SYSTEM PROBLEMS ON A 2000 CHEVY

You may have power there, the PCM will cut power to the pump relay after a few seconds if the motor isn't running. Check it when the keys first turned on - you may have to have to have a helper. If you don't have any power then, check the ecm1 &2 fuses.

Posted on Jan 17, 2011

emissionwiz
  • 75051 Answers

SOURCE: 96 chevy truck, fuel pump relay switch (located under the hood, driver's side wheel well) keeps shorting out and melting fuse panel

I would replace the fuel pump and the fuel pump connector, both have problems in this year that cause excessive current draw and blow the fuse and overheat the system. If the relay socket terminals are discolored from heat that must be replaced as well. Of course before replacing any parts have a GM dealer confirm the problems i have guessed are to the cause.

Posted on Jul 09, 2012

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1 Answer

Which relay under the dash controls the fuel pump


Only the PCM and the fuel pump relay power the pump.
If the engine runs on starting fluid, we can assume the ASD relay is working because the coils have voltage from it.
You need to check to see if the pump relay has power from a 20amp fuse and a ground signal from the PCM. If it does, and you have power to the pump, the pump has failed.

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I WHANT TO NHOW WERE IS THEFUEL PUMP SWITSH FOR 2000 BLAZER


The fuel pump relay is ECM B and the fuse is a 20 amp fuse.
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  2. Remove negative battery cable.
  3. Now remove the cover to the fuse panel under the hood.
  4. Now remove the fuel pump relay. There should be a schematic on the inside of the lid.


Diagram is of the fuse block that is under the hood
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Regards, Tony

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I'M HAVING FUEL SYSTEM PROBLEMS ON A 2000 CHEVY BLAZER. I HAVE POWER RUNNING TO THE RELAY BOX, AND TO ALL RELAYS AND FUSES EXCEPT THE FUEL PUMP RELAY


Could be that the fuel pump relay is bad, have you switch out the fuel pump relay with another relay of the same specs. If that doesn't work, then check if there is another fuse that related to the fuel pump, could be like those fuse under your kick box panel if it is blown. If not, you could have bad fuse box.

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SHOULD BE UNDER THE HOOD IN A BLACK PLASTIC BOX MARKED FUSES. UNDER THE COVER FOR THE FUSES IS THE DIAGRAM TO LOCATE THE FUEL PUMP. HOPE THIS HELPS. GOOD LUCK.THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. PLEASE KEEEP ME POSTED.

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