Firewall Tach Hole?

davidarch90 · Sep 13, 2020

I'm new to Mopar and learning news things every day, but this ones a mystery. Does anyone know of a reason why a Tach hole would not drilled at the factory for a 1968 Coronet? The guy on the line just forgot to drill it or it was late on a Friday afternoon before a 3 day weekend? The car was ordered and delivered with a tach but the wire was run above module. Tach Wire has the factory grommet on it. See photos. The car is completely original and has never had any work done to it.

Thank you.

Beekeeper · Sep 13, 2020

Yep looks like it got missed

Ron H · Sep 13, 2020

Something don't look right there. I didn't have a factory tach in my car; but it's a small wire running off the coil and found several spots in the firewall to simply route it through. That location through the top of the BH (?) looks really odd, don't know the OEM setup for your car...but that sure seems off.

dadsbee · Sep 13, 2020

Easiest thing to do if the tach "hold puncher" was at lunch...

Ron H · Sep 13, 2020

If that wire isn't crushed to smithereens btw the BH and wall having a working tach yet, you've been fortunate...

hunt2elk · Sep 13, 2020

Can't believe that wire hasn't shorted to ground in 52 years time. You can be sure that I never owned that car, as my luck isn't that good.

5wndwcpe · Sep 14, 2020

This is where it goes on a '70. A '68 is most likely the same.

http://www.1970gtxregistry.com/1970gtxN85harness.htm

Beekeeper · Sep 14, 2020

Here’s where it goes on a 69’ so probably the same for 68’

1968rt · Sep 14, 2020

J

ust drill out that dimple!

5wndwcpe · Sep 15, 2020

Along these lines - does anyone know where to get just the grommet for a tach wire ?

davidarch90 · Sep 15, 2020

5wndwcpe said:
This is where it goes on a '70. A '68 is most likely the same.

http://www.1970gtxregistry.com/1970gtxN85harness.htm

Thank you so much and appreciated. I will drill and reinstall correctly this weekend. 52 years is long enough to be in the wrong hole!

davidarch90 · Sep 15, 2020

Beekeeper said:
Here’s where it goes on a 69’ so probably the same for 68’
View attachment 1002043

Yep, that's the spot it will be going. Thank you so much.

davidarch90 · Sep 15, 2020

1968rt said:
JView attachment 1002046 ust drill out that dimple!

Will do! Thank you so much for the help. Like others have said, I'm really surprised it hasn't shorted out in 52 years.

Firewall Tach Hole?

davidarch90

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Beekeeper

It’s a disease without a cure!

Ron H

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dadsbee

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Ron H

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hunt2elk

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5wndwcpe

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Beekeeper

It’s a disease without a cure!

1968rt

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5wndwcpe

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davidarch90

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davidarch90

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davidarch90

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