2000 S-10 4.3(262CU)Vortec no power to fuel pump via harness

[oldblue84]

I have an electrical problem no power to fuel pump via harness all fuses are good relay(s)are good Ihave by passed the harness (Hot wired the pump & engine runs)I'm at my wits on this one what is the problem if some one has the answer(s) to this one e-mail me @ [email protected] Thanks.

[shorod]

Per the forum guidelines, I'm not going to send you an e-mail with this information. This information could be helpful to others in the future who search the forum for an answer to their similar problem.

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.

-Rod

[oldblue84]

Originally Posted by shorod

Per the forum guidelines, I'm not going to send you an e-mail with this information. This information could be helpful to others in the future who search the forum for an answer to their similar problem.

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.

-Rod

Thanks amillon times tk is on th road agin ihav another1left tailamp blinks super fast when turn signal is on ,when park or running lights are on / or off when brake is applied turn signal doesn't work or tailamp doesnt work at all talk about poltergeist ,all grounds are active any ideas to resolve this new / old problem

[shorod]

So what did you find to fix the fuel pump issue?

As for the light issue, that sounds mostly like you have a bad bulb. If all bulbs work, then I'd suspect you have a ground issue that you haven't found yet. Was the truck ever wired for trailer lights? Often trailer wiring installers will use wire connectors that are not intended for outdoor use and they corrode and cause the wires to corrode as well.

-Rod