Your last post gave me something to work with in trying to help get this resolved.
The 3488623 wiper switch you have is not from an E body. It is from a 72 - 73 C body. I found front and back pictures of the part number you have listed. It is retangular in shape and the handle moves vertically. Not being sure if the switch panel has been modified to mount this switch, you may want to install the correct switch. The correct one for a 73 E body is a 3488773 two speed rotary switch.
I am familiar with only a couple of model numbers for the two speed E body motors, 2926929 and 3431718. There may be other model number motors for the E bodies. With the part number for the motor you have being 3799239 seems really high for an E body. The second digit 7 might have that being from mid to upper 70s.
I have circled with colors the connections between switch and motor without anything else in line. The Pink line is the power from the Painless harness. I am showing the short harness that connects between the motor and the bulkhead connector. Since you are using the Painless setup, you will be wiring directly from the switch to the motor.
These are the position names on the 3488773 circuit board.
A - Brown
B - Pink on original harness (Ignition On Power)
F2 – Green
H - Red
P - Blue
I hope this was able to help you. Please don't laugh at the motor (
), it's just a test motor and it works!
Slotts