A different factory tach question
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Freshman User
Joined: May 2007
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A different factory tach question
Hey all,
I recently bought an instrument cluster with a tach for my `86 F150 302. It plugs in, and all the guages work except the tach. My wiring harness has been butchered up by the previous owner to go back to a carbed engine. I can easily identify the "tach" wire coming from the coil pack. Is it possible to hard wire the factory tach to the coil to make it work? I tried attaching the "tach" wire from the coil to the green/yellow wire on the instrument cluster harness with no results. Any ideas? I could put the tach in my original tachless cluster and hard wire it from there...
I recently bought an instrument cluster with a tach for my `86 F150 302. It plugs in, and all the guages work except the tach. My wiring harness has been butchered up by the previous owner to go back to a carbed engine. I can easily identify the "tach" wire coming from the coil pack. Is it possible to hard wire the factory tach to the coil to make it work? I tried attaching the "tach" wire from the coil to the green/yellow wire on the instrument cluster harness with no results. Any ideas? I could put the tach in my original tachless cluster and hard wire it from there...
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Originally Posted by jmkelly
Hey all,
I recently bought an instrument cluster with a tach for my `86 F150 302. It plugs in, and all the guages work except the tach. My wiring harness has been butchered up by the previous owner to go back to a carbed engine. I can easily identify the "tach" wire coming from the coil pack. Is it possible to hard wire the factory tach to the coil to make it work? I tried attaching the "tach" wire from the coil to the green/yellow wire on the instrument cluster harness with no results. Any ideas? I could put the tach in my original tachless cluster and hard wire it from there...
I recently bought an instrument cluster with a tach for my `86 F150 302. It plugs in, and all the guages work except the tach. My wiring harness has been butchered up by the previous owner to go back to a carbed engine. I can easily identify the "tach" wire coming from the coil pack. Is it possible to hard wire the factory tach to the coil to make it work? I tried attaching the "tach" wire from the coil to the green/yellow wire on the instrument cluster harness with no results. Any ideas? I could put the tach in my original tachless cluster and hard wire it from there...
When you bought the cluster, did you get the printed circuit? The printed circuit is different when a tach is present.
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Freshman User
Joined: May 2007
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The new cluster does have the printed circuit for a tach. It's just the wiring in my F150 has been so cut up in the engine bay. I've got to figure out a way to run my own wiring to the factory tach to make it work, but I'm not sure how to hook it up.
Thanks for the welcome - these forums are great!
Thanks for the welcome - these forums are great!
