i need help fast! speed sendor

i bought a speed sendor deal that converts a manuel speedometer to electric. ibout one for my truck but it didnt come with directions.

its a vdo speed sendor. it has 3 wires and a wire that doesnt have and coating around it. my question is how do i hook it up. their is a redish pink wire, a whiteish graywire, and a black wire and another wire with no caoting on it. if anyone can help me oput let me know thanks!

oh i forgot i have one wire coming out of the gauge cluster for the speedometer.

anyone?

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