WHAT GOES HERE?

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CFD244

"THE NEW OLDSMOBILES ARE IN EARLY THIS YEAR"
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Hi Folks

Just wondering what this hole in the firewall just above and to the left of the parking cable is for? I've seen firewalls with this hole, and I've seen them where there was a dimple at this location.

Thanks FABO

Edit: And no, the inner fenders are not black :lol:

IMG_1831.JPG
 
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On my 71 Demon it’s where the factory tach wire is. A picture that a member posted here. Hope they don’t mind a repost. I kept a copy for my reference.

IMG_0813.jpeg
 
On my 71 Demon it’s where the factory tach wire is. A picture that a member posted here. Hope they don’t mind a repost. I kept a copy for my reference.

View attachment 1716327459
Thanks for the reply. I have dimples in the location of the factory tach wire in your pic. The hole I am referring to is just above and to the left of the parking brake cable grommet.
 
Could it be for the hoses for the manual foot pump windshield washer?

What year car?
On my 70 Dart the window pisser hoses are where the picture shows “plugged on my car” by where the ballast resistor sits.

Edit. I don’t have the hole OP is asking about.
 
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Could it be for the hoses for the manual foot pump windshield washer?

What year car?
It's a 71 Demon auto, but the firewall is from a donor and I'm not sure what that was. My guess........Possibly the reverse indicator light from a stick car? Hoping someone will confirm. I originally thought that it may be the tach, but @Dubob 's picture shows that it is not.
 
Hi Folks

Just wondering what this hole in the firewall just above and to the left of the speedo cable is for? I've seen firewalls with this hole, and I've seen them where there was a dimple at this location.

Thanks FABO

Edit: And no, the inner fenders are not black :lol:

View attachment 1716327456
Your speedometer cable appears to be in the parking brake cable hole, and the hole your asking about almost looks like someone drilled it, not factory. That's how it looks from here anyway
 
Your speedometer cable appears to be in the parking brake cable hole, and the hole your asking about almost looks like someone drilled it, not factory. That's how it looks from here anyway
^ Think he’s right, my emergency brake cable is in the hole under the voltage regulator.
 
Did some sleuthing....

Screenshot_20241114-161547.png

Red is E Brake cable (not speedo cable)
Yellow is your hole
Green is the speedo cable


Google claimed this is a 71 duster.
Screenshot_20241114-161446~2.png



Red is E Brake cable
Yellow is a simple
Green is the hole for the speedo cable.
 
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Did some sleuthing....

View attachment 1716327494
Red is E Brake cable (not speedo cable)
Yellow is your hole
Green is the speedo cable

View attachment 1716327495


Red is E Brake cable
Yellow is a simple
Green is the hole for the speedo cable.
Yup, the yellow arrow. I've seen 2 firewalls with the hole in the exact same place and 2 with just the dimples. Just wondering what goes in the hole.
 
I know in 67 the tach wire was in the harness and went through the bulkhead, I believe in 68 they changed that, don't know where they put it.


Alan
 
Looking at the FSM for my 1970 Dart the only two single wires that go through a grommet is:

Tach wire. Gray with a tracer
Manual transmission clutch start switch. Dark Green
 
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