Topic: 68 Factory Tach Ground Wire

[janschutz]

When I installed my 68 tach, I had lost the ground wire so I had just made one.  I finally found it so I thought I share its details.  It is 8 3/8" long, Stamped on it is  C8ZB-19C661-A P SX FOMOCO.  I can not tell if there is a S or a 5 next to the X.

[midlife]

I don't understand; the tach only has an input and output line.  There's a light bulb illuminating the gauge, and a general ground wire to the dash through the dash cluster harness.  On the main harness, there's a ground line with a ring connector that goes to the chassis. 

Are you talking about a tach on the hood rather than the dash?

[janschutz]

The in dash factory 6K tach.  I Hope I did not hook it up wrong.  I can take a picture of how I hooked it up in a couple weeks when I have it out again.

[68 S Code]

Since only one of the ends is shown it's hard to tell but could it be the ground wire from back of block to firewall?

[TLea]

The factory tach has nothing like that, like Randy said it is lead in, lead out. Both are bullet connectors. It does kind of look like the firewall ground strap

[Andrew@MagMustangs]

Wire Engineering Number -19C661- is called out under Factory Installed Integral Air Conditioning for 1968. Andrew