crash

Ok, doing a prodject for a guy in a 94 toy x-cab pickup, used to have a 3.0 I have full access at work to ALL DATA (like chiltons online) but the info I really need is incorrect. The info states there is a speedo cable with the speed sensor in the back of the speedo head(like early versions), but its not true, the truck in question has a speed sensor setup. Now my question is, any body know the pulses per revolution of the speed sensor, and what the wire colors are from the speed sensor..

thanks...