Black/Green Wire.... High speed
Black/Yellow..... Medium speed
Black/Red...... Low speed
The single wire.... Goes to the blower motor
The escort resistor has a total of 5 terminals.4 on one connector and a single wire. The single wire connects to the signal wire on the merkur.
Now the other 4 terminals are for the speed control.
____A ______D
____B ______C
.......... ....... ... [ E]... singe terminal
________________________
Pin A is high speed
Pin B is Medium high speed
Pin C is medium low speed
Pin D is Low speed.
Now you can only use 3 terminals for the XR. What I did was use only A,B,and C. and left D alone. Terminal C is slow enough for low speed, D is really slow.
Terminal A to Black/Green Wire
Terminal B to Black/Yellow Wire
Terminal C to Black/Red Wire.
Sit the blower motor resistor in the factory location and check the fan speed function. Now I said the connector is optional for one reason. You can remove the spade terminals from the factory 3 pin connector and slide them onto the resistor. The singe wire that connects to the blower will slide on the single terminal. I did this to check the function and you could leave it this way or wire the pigtail in and keep a factory appearance.
Enjoy.
