Hi,
The yellow and white wire should have power. It is powered by a fuse in the under-hood fuse box.
I attached a wiring schematic below of the circuit, so you have a reference.
Recheck the alternator system fuse in the under-hood fuse box. In addition, it is important to confirm there is power to and from the fuse.
Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-a-car-fuse
Let me know what you find or if you have other questions.
Take care,
Joe
See pics below. Note: Pic 2 shows the fuse location that I referred to above.
Images (Click to make bigger)
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Sunday, September 11th, 2022 AT 6:21 PM