Hi,
At the fuel pump, there are only two wires. One is a power supply and the other is ground. The ground is a black wire.
I attached a pic of the connector below. It is a 4 pin connector, but only two of the pins are used. Let me know if that helps or if you have other questions. Also, on the connector side, check pin 3 for continuity to ground to confirm it is the correct pin.
Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-wiring
Let me know what you find or if you have other questions.
Take care,
Joe
See pic below.
Image (Click to make bigger)
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Sunday, May 2nd, 2021 AT 9:08 PM