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Where is the fuel pump relay located in a 2006 lexus es330. We have looked and searched in both the engine relay box and the fuse box under the dash and only found fuel injector system fuses and all of them are good. In fact the motor runs with gas directly put into the engine and the fuel pump works with a test wire directly hooked to battery. I traced tje powet wire from fuel pump to a multi wire clip under the fuse box. Where the power wire for the fuel pump is is not getting power. The float clip wire hookup in the fuel pump is working so i am stumped. I think whatever is powering the fuel pump power wire is not supplying power anymore. And everything else is working fine and noone online or in person can seem to find a fuse or relay that goes to the fuel pump and like i said we have triple checked all efi and ignition fuses and relays in the car and changed them around and they all are working. The manual has no info on this either. I need help.

Posted by Kevin on


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Lo B

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Switch the horn relay with the c/op relay to see if it’s the relay. I don’t know why they have to give u complicated answers.

Posted on Sep 13, 2020


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  • 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


Harvey N Tawatao

  • 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


  • 73 Answers

SOURCE: i have a 1990 lexus ls 400 it has no power to fuel

yes have the computer repaired and this should fix the problem. these cars are known for have the computers go bad.

Posted on Oct 12, 2009

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Jeremy W.

  • 5332 Answers

SOURCE: no power to fuel injectors, ignition fuse, or fuel pump

Year, make, model, and engine size?

I’m happy to assist further over the phone at

Posted on Apr 05, 2013

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