Much practical wisdom in this post! In cases like this where there's a discrepancy between what's shown in the schematic and the spec block of the tech sheet and what's written in the service test descriptions, another thing you can do is look up the part(s) in question (evap fan or condenser fan) at an online parts site and read the spec label on the motor itself. 

For example, the model in question for this post is Kitchenaid KBFS22EWMS3. Plug that into an online parts site like RepairClinic or Appliance Parts Pros (two sites that have good photos of many parts), and look at a photo for the evap fan motor and condenser fan motor. You'll see this picture for the evap fan motor:

Any tech who's been in the trade for a just a few months shouldn't even need to see the spec label on the motor to know what kind of motor this is just by sight: it's a standard shaded pole motor. Shaded pole motors are single-speed AC motors. Always and everywhere. 

The condenser fan motor can be a little more tricky. Let's take a look: 

Oh my, this is confusing-- its doesn't look like a shaded pole motor at all. Instead, it looks like it could actually be a 4-wire BLDC motor. How can we tell for sure? Check the specs on the motor! Here's a picture of the spec label on this motor: 

And there it is bigger than life: the AC power supply spec is printed right on the motor label. No BLDC, variable speed motor here! 

This is just another easy and practical way to clear up conflicts between the schematic and the technical writeup on tech sheets.

Go ye forth and conquer! 

Anytime you see redundant wires like this in the power supply to a load, these are usually sensing lines that the board uses to determine if the load is getting a valid power supply in a complete circuit.

In this case, we have a sensing line in the Neutral side of the motor’s power supply. The board uses the extra line to sense the presence of Neutral.

More info on sensing lines in this post: 

17 hours ago, Slav said:

But in this particular case, both pins 4 and 5 run un-switched wires to the load

This is not necessarily a true statement. The board itself is functioning as the switch to the load.

Let’s suppose that the board switches Neutral to the motor. That switching could happen on pin 4 or pin 5. We don’t know based on the paucity of information offered to us by Whirlpool. But it doesn’t matter because both points are EEPs— they look identical to electrons. So when either of them closes and supplies Neutral to the load, the other point looks the same to electrons and, more importantly, to our meter. Given this information then... 

17 hours ago, Slav said:

So if I need to check the Evap fan, I'll use pins 8 and 5... but pins 8 to 4 should give me the same result, right?

Da tovarish! Or, as we say at Appliantology, “Correctilia.”  

Just now, vallen513 said:

Was this an actual call? Like did you test the fan in the service directions? What did the refrigerator do?

This was a piece of a war story from one of the techs here at Appliantology. I don't believe he ever said how that step of the test behaved, but he did confirm that it was a simple 120 VAC fan motor.