| ...the plug by the relay box ("white" plug, 6 wires). Likely your NA body harness does not have this leading out of the receiving side however. You will have to pin the plug for this wire. (Or you can solder to the wire on the other side, not recommended) You will also need the relay and relay base for the relay box. You can mimmick the green/white and purple wire position from the NA fan relay. Then you need to put a wire from the new relay (from the same position as the blue wire on the NA fan relay) to the ECU pin 6 (white) wire. Then you need to put a wire from the new relay (from the position of the green wire on the NA fan relay) to the TT fan low speed. Make sense? If not, I painstakingly (lazily) created a modified wiring diagram for you. I omitted everything besides the fan circuits. Left side of the plug is the EFI harness, right side is the body harness (they connect on the DS fender next to the relay box) 
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