simulating a tach and a vss wire

Honestly I'm not sure if this is the best place for this question, but I figure that most of the people that are familiar with working with tach wires etc would be those lurking in this forum. If it needs to be moved, feel free :) That being said, here's what I'm attempting. I've been working with my interior lighting and have changed the interior lighting to all red with led's. The gauge cluster looks cool and all but I'd like to add something a little different. What I'm trying to figure out is how to simulate a tach wire and vss wire so that upon ignition my tach needle would peg and then drop back to 0 (like this audi does - http://www.youtube.com/watch?v=b4Wckl5dIBI). From my understanding of tach wires, they "work off of" ac voltage but am unsure about how to recreate this. As for the vss, I would assume it runs off 12vdc, but am not positive. If it matters, the car is a 99 civic ex (for all intensive purposes anyways).Thanks for any help!

electronic vss in dash ?

I am unsure. I know the vss is on the tranny and has 3 wires.

If you look at the 3 wires from the trannie, 1 will go live with ign., 1 will go to ground and the third is the one you want for VSS. You left one very important thing out, make, model and year vof vehicle?

howie ll wrote: If you look at the 3 wires from the trannie, 1 will go live with ign., 1 will go to ground and the third is the one you want for VSS. You left one very important thing out, make, model and year vof vehicle?

I actually listed at the end of the first post. Car is a 1999 honda civic.

Speed Sense BLUE/WHITE 4000 (AC) PASS FIREWALL 3 PIN CONN TOP TRANSAXLE note the 4000 is the signal rate. I am not familiar w/ VSS but check in cruise control sectino.Houston,TX

"The two most common elements in the universe are H+ and stupidity" (Ellison).

Man this thread didn't do so hot ha ha. I looked in the cruise section, but didn't find any useful info :SLots of diamond audio and clifford junk :P