Tach not working!
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Junior User
Joined: Oct 2007
Posts: 66
Likes: 1
From: Calgary
Tach not working!
I have a 85 diesel f-250 and i just bought a cluster with a tach, installed it and the tach doesn't respond. The original cluster is tach-less. I must be missing the sending unit or something.
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
First thing to check ..... is there a place for a large 1" bolt on the timing gear cover where the IP attaches. It is on the drivers side top of the cover..next to the oil filler hole..... that would be where the sensor is installed when used. Older engines had the forward/up oil filler centered on the cover face. If you do not have the new one then replacement of the cover is required first..... then the sensor and wiring.
Hopefully a member with the wiring/installation info will post........
Hopefully a member with the wiring/installation info will post........
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
You need to look around the IP and see if you can find the tach wire connector.
[img]https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=101280&.jpg
[/img]
If you have the connector, all the wiring is already in the harness.
You do need to swap the entire cluster, the non tach clusters do not have the tack circuit on the printed circuit behind the cluster.
Also do you have a plug in the IP drive gear cover where the tach sensor goes?
The tach sensor is available at Ford, I think the last one I bought was 47 dollars.
[img]https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=101280&.jpg
[/img]
If you have the connector, all the wiring is already in the harness.
You do need to swap the entire cluster, the non tach clusters do not have the tack circuit on the printed circuit behind the cluster.
Also do you have a plug in the IP drive gear cover where the tach sensor goes?
The tach sensor is available at Ford, I think the last one I bought was 47 dollars.
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