3 wire speed sensor

[stlol]

Can anyone tell me what the three wires should be on a mk1 Tuscan,
I'm guessing
Brown +ve ??
Black pulse??
Blue earth??

Edited by stlol on Tuesday 9th April 15:19

[JimmyZZ]

Just changed the sensor on my Tuscan.
Correct wiring is:
CAR
Green - Black - Grey
Brown - Blue - Black
SENSOR