Have you checked for power at the black wire with a red tracer at the starter? That comes directly from the battery and should have 12v at all times. There is a fusible link that could have failed preventing power to that wire.
Also, there is a black wire with a white tracer that should have 12v only when in the start position. You will need a helper but check that as well.
If you find power at both, chances are the starter failed. Here are two links you may find helpful:
I attached a wiring schematic below of the starting system. I highlighted relays I need you to check. If there is another relay with the same part number, switch them. If there isn't, here is a link that explains how to test a relay.
Let me know what you find or if you have questions.
See pics below.
Images (Click to enlarge)
Saturday, October 9th, 2021 AT 6:52 PM