Installing tachometer, need info.

Reply Subscribe

Thread Tools

Search this Thread

Mar 30, 2016 | 12:37 PM

Unaffiliated

Thread Starter

Junior User

Joined: Nov 2015

Posts: 64

Likes: 0

Installing tachometer, need info.

I'm installing a AutoMeter tachometer in my 1989 F-150. The usual way to wire it is :
Green : Negative side of coil.
White: Dimmer switch
Red: Ignition switch key on
Black: Engine ground.

Now, I've read about some models coming out of the factory with tachs. Apparently, the wiring behind the cluster goes like this.

Name: tTimyXP.png
Views: 1444
Size: 42.0 KB

Name: tTimyXP.png
Views: 1444
Size: 42.0 KB

Would it be possible for me to wire the green wire of the tach to the dark green/yellow wire of the cluster instead of making a mess in the engine bay?

Thanks.

Mar 30, 2016 | 07:22 PM

Lead Head

Lead Driver

Joined: Jul 2007

Posts: 7,868

Likes: 9

From: Rhode Island

Shouldn't be a problem

Mar 31, 2016 | 09:56 AM

Zombiemom

Freshman User

Joined: Sep 2015

Posts: 49

Likes: 0

I tried that. The tachometer didn't work. I've read several posts about people having the same problem. Save yourself some time and aggravation and splice it off the coil.

Mar 31, 2016 | 10:23 AM

Unaffiliated

Thread Starter

Junior User

Joined: Nov 2015

Posts: 64

Likes: 0

Quote:

Originally Posted by Zombiemom

I tried that. The tachometer didn't work. I've read several posts about people having the same problem. Save yourself some time and aggravation and splice it off the coil.

Will do, thanks. Don't wanna go trough the hassle of removing the instrument cluster for nothing.