Tach Wiring for inline six
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Senior User
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From: Mount Vernon, Washington
Tach Wiring for inline six
I've got an autometer tach that I want to put on my 300/6 but no instructions. Do I cut the brown or the orange wire to get it to function on a 6 cylinder? Thanks in Adavance. Oh and this is my first post on this forum and I love it. Mike-'65 F-250
Post Fiend
Joined: Jan 2000
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From: Metro Detroit (Redford)
Tach Wiring for inline six
I have a Chilton's manual for Ford Pickups 1965-1986. It shows a diagram of a coil with tach hookup for a 1974 and earlier F series truck. In the diagram if you look at the coil so that the two small wire terminals are in front of the high voltage terminal, then the one on the right is shown as the tach hookup and is called the "Coil Distributor Terminal." Lets see if I can lay it out here, as if looking down at the top of the coil. The book shows:
-#-
o-x
# is the high voltage terminal
o & x are the small terminals
- is just a spacer for this diagram
the tach hookup is "x"
This, all according to the diagram in the book noted above. Whether there are any variations, I don't know.
INLINE SIX POWER!
'95 F150 XL
300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!
"Drive a stick young man! There'll be time for automatics when you're old and unable."
-#-
o-x
# is the high voltage terminal
o & x are the small terminals
- is just a spacer for this diagram
the tach hookup is "x"
This, all according to the diagram in the book noted above. Whether there are any variations, I don't know.
INLINE SIX POWER!
'95 F150 XL300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!
"Drive a stick young man! There'll be time for automatics when you're old and unable."
Post Fiend
Joined: Jan 2000
Posts: 5,860
Likes: 4
From: Metro Detroit (Redford)
Tach Wiring for inline six
This should help even more. I have Peterson's "Basic Ignition and Electrical Systems" (1975). It shows the coil on page 34 and says, "This Ford coil is marked "BAT" and "DIST" for use on a negative ground car." Maybe yours is marked this way too. Anyway the tach terminal would be DIST.
New User
Joined: Oct 2002
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Tach Wiring for inline six
The color of the wire depends on the year, as well as the location I think, but for my 94 there's a tan wire with a yellow stripe at the ignition coil. You can put a snap on this and run it in through the cab and you're all set. Newer models (97+?) have the wire at the PCM I think.
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
Tach Wiring for inline six
The tach should be wired to the negative side of the coil. Ford coils usually say "bat" and "dist" on them, the "dist" is negative. Aftermarket coils often are marked + and -.
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