I attached a wiring schematic below of the circuit. Note that the schematic is for dual tanks. I focused on a single-tank vehicle.
You indicated the relay is good. How was it checked? I ask because the relay can be good, but there are two separate power sources that need to go through it to work. One is provided by the PCM and the other is from the PCM B fuse in the under-hood fuse box.
Take a look at this link. It explains how to test a relay circuit.
Let me know if you have already done this or what the results are.
See pic below. Please ignore pic 1. I added it by accident and can't get it removed.
Images (Click to make bigger)
Tuesday, November 29th, 2022 AT 9:06 PM