72 Non Clock Skylark have harness back there?

My Skylark Custom does not have a clock. Is the harness back there to install one if I found one to put in there?

 

Pretty sure it will have the harness + the 2 lamp sockets. Sockets are gray conductors, taped up at the factory while not in use. They work with the clock or the tach..

 

Yes. It's a pigtail for the terminal on the back of the clock that powers the "winding", and if I recall correctly, a wire and female terminal and then a two wire with bulb sockets for the clock illumination.

 

So I could throw a tach there instead and the same wiring for the clock will work the tach?

 

Next question, does the instrument cluster come out as its own pc or would I be pulling the dash?

 

Light sockets yes. Tach signal is another wire off the - coil terminal.
The power wire is for the clock winder power.

If you do not have a shop manual, you really need one.

I would buy this set, well worth every penny paid.

https://www.ebay.com/itm/1972-Buick...502372?hash=item4431a264e4:g:bRgAAOSwgVJcJe72

 

Is the tach signal wire back there behind the cluster?

 

Tach signal was not factory installed unless the car was so equipped. Brown single conductor goes through a grommet in the firewall & travels on to the coil. Get hold of a Chassis Manual to show exact routing. Fisher prepped the body & the engine plant installed the correct wiring harness for a car equipped with a tach. There is a male/female connector in/around the brake booster area, maybe the wiper motor, to join the body harness to the engine harness. A dimple will be present in the firewall for the correct location. Think I ran mine through an existing grommet for the AC vacuum lines rather than drill a new hole.

 

Pulling the dash.
Again, check the Chassis Manual for the cluster wiring paying close attention to bonding or grounding straps between the different instrument cases. They may be different.
I found out the hard way about upgrading from base wipers to the hidden park set-up. Intermediate factory harness had to be removed from behind the switch & grounding changed on the switch frame to get it right.

 

so clock or tach install the dash needs to come out. That is a ton of work.

 

Nothing you can't do on a Saturday afternoon. Of course, one thing leads to another. Before you know it you'll have the back seat out trying to add a rear speaker wire.......while it's apart. Careful pulling the dash, make sure you have ALL the mounting nuts removed. Miss one/forget one & start tugging just a little too hard..........not a good ending. I have experience with the "not a good ending" part.

 

nah don't see messing with the dash.