Hi,
If you are pumping fuel with the fuel pump relay removed, you have a short to power which is providing power to the pump at all times.
Looking at the schematics, I noticed the ECMB fuse in the underhood fuse box (right next to the fuel pump relay) is what powers the pump. Do me a favor. Remove the fuse and see if the problem still exists. If it does, we have a short at a different place. If it stops, there is a good chance the fuse box is shorting between the two components.
Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-wiring
Below, I attached the wiring schematic for the entire powertrain control system in the event you need them. If you look at pics 5 and 6, I highlighted the wiring to the pump from the relay. Also, I circled the fuse and put an arrow where I think the short exists.
The last pic shows the underhood fuse box. I highlighted the ECM B fuse. That is the one I need you to remove to see if the pump stops.
Let me know what you find or if you have other questions.
Take care,
Joe
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Sunday, May 16th, 2021 AT 8:03 PM