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Old Dec 16, 2015 | 12:43 PM
  #21  
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Hi b,
Ken 74's harness may go over the top of the speedo and tach but your 69 harness doesn't.
Are you sure you're working a 69 harness?
69 v's picture shows the proper routing… LOW. You can even see the slight 'hump' in it where it passes over the column.
Regards,
Alan

This is the HIGH route… the 69 harness can't do it.



Last edited by Alan 71; Dec 16, 2015 at 12:45 PM.
Old Dec 16, 2015 | 05:59 PM
  #22  
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ballen06 - the harness lays just on top of the column and in front of (from the driver's perspective) the rusting cast iron chunk (part no. 3945325 in the AIM) shown in your pic. This will position it below the speedo & tach drive cables. As Alan said, there is not enough slack for it to fit elsewhere. If memory serves me correctly, I tried to route it higher (above the speedo/tach) but several of the dash light sockets pulled out.

Tom69 - I believe the black & white wires connect to the driver's side door jam switch. The white wire controls the courtesy lights; the black wire controls the key warning circuit. When the door is opened, the jam switch takes both to ground. If the broken black wire should go to ground, the buzzer would sound with the key in the ignition as if the door were open. However, if you were getting the buzzer with the key out, you may have a bad key warning switch (or other problems).
Old Dec 16, 2015 | 06:27 PM
  #23  
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Originally Posted by ballen06
If it exits out of the dash harness ...I'm thinking it could be the ground cable for the speedo console...
Originally Posted by Alan 71
Hi T69,
The black wire you asked about is a ground wire.
It's shown in the AIM page sully posted… it's at the extreme right border, about 1/3rd of the way up the page.
It mounts to the birdcage hinge pillar using a hex head screw.
Regards,
Alan
Originally Posted by 69vette19467
ballen06 - the harness lays just on top of the column and in front of (from the driver's perspective) the rusting cast iron chunk (part no. 3945325 in the AIM) shown in your pic. This will position it below the speedo & tach drive cables. As Alan said, there is not enough slack for it to fit elsewhere. If memory serves me correctly, I tried to route it higher (above the speedo/tach) but several of the dash light sockets pulled out.

Tom69 - I believe the black & white wires connect to the driver's side door jam switch. The white wire controls the courtesy lights; the black wire controls the key warning circuit. When the door is opened, the jam switch takes both to ground. If the broken black wire should go to ground, the buzzer would sound with the key in the ignition as if the door were open. However, if you were getting the buzzer with the key out, you may have a bad key warning switch (or other problems).
Thanks for all the input. Once my aching back from the radio install calms down, I'll delve back into troubleshooting that broken wire. My speedo/tach instrument and courtesy lights operate so perhaps that broken wire is in fact part of my key warning/buzzer circuit. Also, my steering column was replaced with a rebuilt TT with all new wiring so the key end of the wiring may be okay.

Regards,
Tom
Old Dec 16, 2015 | 06:57 PM
  #24  
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I have worked on many 1969's and the last one the wiring DID NOT go on top of the speedo/tach. It was routed UNDER it. I remember this very clearly....because I know that later years do route the wire harness on top of the speedo/tach and the wire harness straps that bend to hold it in place were not there....like later years.

If you look closely at post #8...at the 1 or 2 o'clock position on the backside the speedo and tach....you can sees strap that is holding the wiring harness to the speedo and tach.

In the later drawing...there is NO straps shown.

ALSO....the length of wires coming out of the harness for your headlight switch can also be a dead give-away. IF they are long....then the harness goes under the gauges.

DUB
Old Dec 18, 2015 | 01:07 PM
  #25  
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Originally Posted by ronarndt
After reading these posts I am REALLY not looking forward to installing my new speedo and tach. I have had the center and right dash off several times and was planning on just lowering the steering column on my 68 to do the installation. Now I think I may need to keep the bottle of Jack Daniels close at hand during the installation.
I would recommend partaking of Jack after you complete the installation
in celebration of a difficult job well done.
Old Dec 18, 2015 | 01:11 PM
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Originally Posted by Alan 71
Hi b,
Ken 74's harness may go over the top of the speedo and tach but your 69 harness doesn't.
Are you sure you're working a 69 harness?
69 v's picture shows the proper routing… LOW. You can even see the slight 'hump' in it where it passes over the column.
Regards,
Alan

This is the HIGH route… the 69 harness can't do it.


Thanks Alan .. However I noticed that when you look into purchasing C# dash harnesses they are the same for 68 through 82's. Is the reason 69's can't route above because of the cable tie clips mounted on the bezels?
Old Dec 18, 2015 | 01:13 PM
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Originally Posted by DUB
I have worked on many 1969's and the last one the wiring DID NOT go on top of the speedo/tach. It was routed UNDER it. I remember this very clearly....because I know that later years do route the wire harness on top of the speedo/tach and the wire harness straps that bend to hold it in place were not there....like later years.

If you look closely at post #8...at the 1 or 2 o'clock position on the backside the speedo and tach....you can sees strap that is holding the wiring harness to the speedo and tach.

In the later drawing...there is NO straps shown.

ALSO....the length of wires coming out of the harness for your headlight switch can also be a dead give-away. IF they are long....then the harness goes under the gauges.

DUB
Oh .. OK.. Thanks DUB.
Old Dec 26, 2015 | 09:19 PM
  #28  
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Originally Posted by Alan 71
Hi b,
Ken 74's harness may go over the top of the speedo and tach but your 69 harness doesn't.
Are you sure you're working a 69 harness?
69 v's picture shows the proper routing… LOW. You can even see the slight 'hump' in it where it passes over the column.
Regards,
Alan

This is the HIGH route… the 69 harness can't do it.


Alan...

Why can't I route my harness above the speedo and tach bezels? The dash harness is the same for all c3's .. if I believe the vendor advertisements. They are all for years 68 through 84.
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Old Dec 27, 2015 | 08:58 AM
  #29  
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Hi b,
I'm not certain what source you were looking at but I'm sure not ALL 68-84 (?) dash harnesses are the same.
I looked at 4 sources including Lectric Limited and each list a different part # for the dash harness for each year.
Regards,
Alan
Old Dec 27, 2015 | 10:02 AM
  #30  
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Originally Posted by Alan 71
Hi b,
I'm not certain what source you were looking at but I'm sure not ALL 68-84 (?) dash harnesses are the same.
I looked at 4 sources including Lectric Limited and each list a different part # for the dash harness for each year.
Regards,
Alan

OH! You are right. I didn't look deep enough... they have a general advertisement which states 68 to 84 then you get on their site and it is different for each year. Wow .. that's an expensive harness.
Old Jan 30, 2021 | 07:37 PM
  #31  
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Found this old thread which describes the difficulty I am having with the lower dash install.
I have a new wire loom which is very stiff. New lower and upper dash pads as well.
Was thinking about opening up the wire loom ‘trunk’ a bit (remove some of the tape) so the wires are more flexible.
Has anyone tried that? Maybe make it more pliable and give wires, bulbs, a bit more reach?

plus, I put the upper dash pad on first as I know that’s how the lower dash attaches. But in doing so I lost as little room to work back there .
Is doing the lower dash install with the upper dash pad already installed is that the correct order?

this is on a ‘69 vert w/out ac.

any help appreciated
Old Jan 30, 2021 | 08:39 PM
  #32  
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If you are willing to modify the harness then all kinds of things are possible. I've done several stages of mods.

1 One of the first things I did was lengthen all the leads to instrument panel lamps so I could plug them in and THEN place the dash in place.
2. I then installed 2 separate connectors, 1 for the the speedo side leads, and another for the tach side leads.... this allowed me to install the components, and then place the dash in it's location, and then plug the harness sides in.
3. I then went to LED strip lighting for the illumination lamps--- so that meant pretty much 1 lead to each side for illumination, plus the others for blinkers, brake light, etc...... still now less leads and still at long length.

I now have the harness on my 68 way up high and tye-wrapped above everthing else in there. Much easier to play with. So, the question is: How much are you willing to modify?

Last edited by carriljc; Jan 30, 2021 at 08:41 PM.
Old Jan 31, 2021 | 01:41 PM
  #33  
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Originally Posted by marky mark
Found this old thread which describes the difficulty I am having with the lower dash install.
I have a new wire loom which is very stiff. New lower and upper dash pads as well.
Was thinking about opening up the wire loom ‘trunk’ a bit (remove some of the tape) so the wires are more flexible.
Has anyone tried that? Maybe make it more pliable and give wires, bulbs, a bit more reach?

plus, I put the upper dash pad on first as I know that’s how the lower dash attaches. But in doing so I lost as little room to work back there .
Is doing the lower dash install with the upper dash pad already installed is that the correct order?

this is on a ‘69 vert w/out ac.

any help appreciated

Its time to start a new thread. Rather than adding your question to a 6 year old thread a new thread will allow people to address your question, which is not the same topic as the old thread.




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