How many wires are on the stock sink? Are they black, yellow, blue, and green? If so more than likely the pin out is: black=grnd, yellow=+12, green=rpm, blue=pwm.
Now how about the accelero? 4? black red yellow and blue? If so it should be this: black is -12, red is +12, yellow is rpm, blue is pwm.
Let me know if this (the colors) is correct. PM me if you want.
How do you feel about splicing? If you have a extender/connector that'll connect to both the accelero and the...