Author Topic: 67/68 4 speed back up harness Cowl Location  (Read 2440 times)

68camaroz28

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67/68 4 speed back up harness Cowl Location
« on: January 28, 2014, 11:55:49 PM »
Well today Iím at a total loss on what or how the back up light switch was hooked up. Why, because where the AIM calls out a .920 to .940 diameter hole to be drilled (dimple location) there is no hole in my cowl. I think I found the dimple or at least it seems to be correct and the NOS underdash mat has a one inch or so hole located where the dimple is. Can someone please show me what they have on their 4-speed 67 or 68 Camaro? When I purchased this car over 30 years ago it was already tore apart so assembly has been, letís just say FUN.... LOL......
Some references: What the AIM calls out for 3C which I think is for the back up harness-


What seems to be my dimple (hard to see in a pic but prominent in person) that has no hole located under the ground strap and zinc screw-


The connection between the two harnesses that is supposed to connect at the firewall-
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584

bertfam

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #1 on: January 29, 2014, 12:45:51 AM »
Chick, if your car is Norwood built, you can take it to the bank that's where the hole was drilled. Los Angeles cars had it in either one of two locations. 3C in the AIM, or just to the left of that at the other dimple. Here's a picture of my LA car. Note the "alternate location" for LA cars.

Ed

cook_dw

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #2 on: January 29, 2014, 12:59:55 AM »
LOS

Darrell Cook
1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28

68camaroz28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #3 on: January 29, 2014, 01:31:22 AM »
Chick, if your car is Norwood built, you can take it to the bank that's where the hole was drilled. Los Angeles cars had it in either one of two locations. 3C in the AIM, or just to the left of that at the other dimple. Here's a picture of my LA car. Note the "alternate location" for LA cars.

Ed

Thanks Ed! Will have to carefully check to see if that hole was plugged at some time as I only see the one dimple stated as an alternate for the LOS cars. Thanks again!
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584

1968RSZ28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #4 on: January 29, 2014, 01:44:21 AM »
Chick,

The connector on my LOS '68Z is in the same location as shown in Ed's and Darrell's photos.   ;)

Darrell,

In your photo, what is the big hole below the backup light connector for?   ???

Paul

cook_dw

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #5 on: January 29, 2014, 01:59:41 AM »
Im not 100% sure at this point.
Darrell Cook
1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28

68camaroz28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #6 on: January 29, 2014, 02:22:03 AM »
Im not 100% sure at this point.
It's almost like both dimples were drilled out Darrell???????
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584

cook_dw

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #7 on: January 29, 2014, 02:57:02 AM »
No the other dimple is there just hard to see due to the angle of the pic.
Darrell Cook
1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28

1968RSZ28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #8 on: January 29, 2014, 03:34:38 AM »
Here's another photo for reference...



Paul

68camaroz28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #9 on: January 29, 2014, 03:51:31 AM »
Paul, do you know if your picture posted is an LOS car? Cannot tell for sure but seems to be NOR? It's drilled where Ed had shown only LOS used that dimple. Interesting that Jerry noted his 07C NOR Z/28 is drilled in that location as well as I had posted similar concern on my build thread. I will know more on my car after a more careful review behind the cowl pad.
http://www.camaros.net/forums/showthread.php?t=182584&page=49
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584

1968RSZ28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #10 on: January 29, 2014, 07:50:53 AM »
Paul, do you know if your picture posted is an LOS car? Cannot tell for sure but seems to be NOR?

Sorry Chick, I don't know.  Kurt probably does as the photo is from the CRG "Option Identification" page...  http://www.camaros.org/options.shtml#id

It is a '67 if that makes a difference.

Paul

1968RSZ28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #11 on: January 29, 2014, 08:05:51 AM »
Chick, I found another photo for reference.  This one I know is a '68 LOS car.



Paul

cook_dw

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #12 on: January 29, 2014, 12:58:49 PM »
Here another pic from a different angle.  As you can see the dimple is still there.

Darrell Cook
1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28

68Zproject

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #13 on: January 29, 2014, 03:45:02 PM »
My LOS 68Z is in the same location as Ed's, Paul's and your last picture.
68Z28

jvb6648

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #14 on: January 30, 2014, 02:09:30 AM »
Chick, will this help, 68 12E Z. Jim
Jim
68 Z/28

1968RSZ28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #15 on: January 30, 2014, 02:17:39 AM »
Chick, will this help, 68 12E Z. Jim

Jim,

That car doesn't have either backup connector hole.   ???

Paul

cook_dw

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #16 on: January 30, 2014, 02:18:29 AM »
Your firewall does not have the reverse switch hole for the grommet.   ???  Also hard to tell if you have the holes for the clips for the speedo cable.   ???  Was your car originally a manual trans car?
Darrell Cook
1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28

cook_dw

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #17 on: January 30, 2014, 02:18:51 AM »
Ahhh Paul you beat me to it.  lol
Darrell Cook
1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28

jvb6648

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #18 on: January 30, 2014, 02:19:18 AM »
oops I think my body guy filled in the hole. About centered and just below the 2 dimples.
Jim
68 Z/28

1968RSZ28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #19 on: January 30, 2014, 02:21:08 AM »
oops I think my body guy filled in the hole. About centered and just below the 2 dimples.

Yup!   :P

Paul

jvb6648

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #20 on: January 30, 2014, 02:58:30 AM »
Well I hope that answers Chicks question, now I have to redrill some holes, you can see where he plugged them.
Jim
68 Z/28

68camaroz28

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Re: 67/68 4 speed back up harness Cowl Location
« Reply #21 on: January 30, 2014, 03:44:36 AM »
Well I hope that answers Chicks question, now I have to redrill some holes, you can see where he plugged them.

LOL but not at you Jim but wondering how many of us have had this. This is what I found today! On my build thread Jerry who has a 07C NOR 68Z noted his hole was where Ed's picture showed used by LOS only. Guess what, that is where our hole was.
With Jerry's info I can only assume there were more than a few NOR cars with that hole dimple 3.5 inches below the ground strap hole used to drill out. I'm supplying pictures of the welded hole easily found behind the under dash mat, and after drilling. With the harness installed one can still see remnants of the weld around the grommet. Turned out fine but it took some time. Also reviewed photo gallery and the hole was not there after media blasting which only verifies it was brazed shut in 1983 or 1984 when it was at a friends body shop for paint. No idea why we/he did that but nothing hurt and its fixed.


Used my first finger to rub around the inside weld and thumb to trace the outside on the tape.


Harness installed-


Harness inside & note some weld showing around grommet.
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584