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+--- Thread: Pillar Tach Hookup Idea (/showthread.php?tid=10036)
Pillar Tach Hookup Idea - ThraxXx - 04-20-2006
A while back, NOS4Me2go installed a cluster in his car with a tach in it. From what he said it was a simple install as all he had to do was just hook up the tach'd cluster and bolt it back in and bam...he had a tach.
Well this got me thinking. Obviously dispite the focus you got you had a tach signal on the harness for the cluster. I was wondering if it was possible to say tap into this wire and use an aftermarket tach on your car.
I bought a 2 guage pod cluster a pillar dealy, a 2" tach and a 2" volt meter.
Well any thoughts on this idea would be great. Also...if say it will work...which wire on the harness would be the tach sending signal?
Pillar Tach Hookup Idea - hardk0re - 04-20-2006
I think the difference is this is a digital gauge, one that is reading values from your computer and displaying them. So no an aftermarket tach won't work unless you get a tach driver. (well thats the easy way) I'm sure theres another way to do it thats cheaper but a little more complicated.
Pillar Tach Hookup Idea - ThraxXx - 04-20-2006
ok I will just go the tach driver way. I just figured that you could tap off the signal on the cluster. Thats how my friend did it in his 1993 honda civic.
Pillar Tach Hookup Idea - habmann - 04-20-2006
Isn't there a pin on the ECU that you can tap and use without using a tach driver?
Pillar Tach Hookup Idea - OAC_Sparky - 04-20-2006
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?Zetecs -- > Yes, ECU Pin 48 (if I recall correctly)
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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.
Pillar Tach Hookup Idea - ThraxXx - 04-23-2006
What about SPI? Cuz thats what my car is packin'
Pillar Tach Hookup Idea - PerfectSaiyan - 04-23-2006
good luck! ^^
Pillar Tach Hookup Idea - NOS2Go4Me - 04-24-2006
The digital / analog thing might come into play. All SPIs are capable of using any N.A. Focus cluster that has a tachometer... this much I'm sure of now.
Also, according to the guys on FJ, the SPI is the same as the Zetec... pin #48 for the tach signal. I would imagine that's a digital signal coming from that wire, though. Not sure to be perfectly honest.