Tach cluster install

[scottxd45]

I have a tach cluster that I'm putting in my '89 L but is doesn't have the wiring for the tach. What all do I need to do since this one unfortunatly is not plug-and-play like my '88 was?

[Unicornasaurus]

I believe you have to splice it into the ignition coil. Into the green wire I think. I'm not sure..its been a while since I installed my tach. I could take a picture when I get home for you, but I'm sure by then someone else will have told you how

[MONSOON]

Is it the factory cluster youre putting in? I thought they were all plug and play.

[scottxd45]

Ya it is factory. Not all of them are plug and play. From what I have read on here it seems if you have rear defrost usually you have the tach wireing. That's how my '88 was but my '89 doesn't have rear defrost and also doesn't have the wire for the tach.

[MONSOON]

They must have changed it with the 90 and up then because neither my 90 nor my 91 had rear defrost and I was able to plug the tach cluster in and go.

[Damkid]

instead of running the wire then trying it, why don't you plug in the cluster and see if the tach works before re-wiring it?

if the tach doesn't work you could always temporarily leave it like that until you got more time to run the tach wire

[scottxd45]

I already know the cluster works because I had it installed in my other car('88 ). I tried it in this one('89) and it doesn't work though.

[Damkid]

oh ok, i didn't know you already installed it in the 89

[Festiva_tunner]

If I remember right when I installed my tach it was the green/yellow wire comming off the coil. Check this thread for pin locations (its a article on the 110 swap but its got a good pin location picturehttp://www.fordfestiva.com/forums/showthread.php?t=7882

[scottxd45]

If I remember right when I installed my tach it was the green/yellow wire comming off the coil. Check this thread for pin locations (its a article on the 110 swap but its got a good pin location picturehttp://www.fordfestiva.com/forums/showthread.php?t=7882

Perfect! That had exactly what I needed. And that green/yellow wire would go to the NEG post on the coil right?

[Festiva_tunner]

Perfect! That had exactly what I needed. And that green/yellow wire would go to the NEG post on the coil right?

Ipulled the loom open a little and the green/yellow was already there but not hooked up; from what I understand yours is not there at all so yes run the wire to the negative side of the tach