This is going to make a dandy puzzle. If these diagrams don't help, the easiest might be to visit a pull-your-own-parts salvage yard and look at the connectors on a similar truck
To get us started, the pink arrows in the first diagram show a pink wire is plugged into terminal "A" in connector C507. The next drawing shows that connector, and the pink arrow is pointing to terminal "A". The problem starts with the rest of the wires. The dashed line along the bottom of the switch, (orange arrow), means those four wires are all in connector C503. In addition, if you look closely at the two lower wires on the right side of the switch, terminals "E" and "B", you'll see there's a barely visible dashed line between them. That indicates those two wires are also in connector C503. The problem is the third drawing shows connector C503 and it only shows two spaces.
To add to the misery, the two upper wires on the right side of the switch, terminals "R" and "M" also are connected by a barely-visible dashed line and are both in connector C507. In the drawing for that connector, there are no terminals "R" and "M" shown.
The fourth diagram is just to show the two dashed lines, (blue arrows), related to the four black ground wires. Those four wires all go to the same place, so the individual wires can be connected to any of those four terminals, "R", "M", "B", and "E".
If you get stuck, try to post a photo of the switch's connectors.
Images (Click to enlarge)
Friday, September 17th, 2021 AT 5:21 PM