[OAC_Sparky]

habmann,Apr 19 2006, 11:20 PM Wrote:Isn't there a pin on the ECU that you can tap and use without using a tach driver?
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Zetecs -- > Yes, ECU Pin 48 (if I recall correctly)

Duratecs -- > No. You need a tach driver. You cannot tap off a lead going to the cluster. The tach signal to the cluster with the Duratecs is a multiplexxed signal (CANBUSS); that is incorporated with a bunch of other signals that go to the cluster and are interpreted.

What you can do (and what I did) is wire the tach driver to the CPS signal at the ECU (inside the car) rather than at the CPS/COP itself (outside the car.)

I have a how-to over at FocusFanatics I can give you the link for if you need it.