Howdy Everyone,

|UPDATED|3/10/2014 3:11:49 PM (AZT)|/UPDATED|

Check the ground at the blower motor....the ground for the instruments/gauges piggy-backs from the blower motor ground. The black wire from the blower motor should be  attached to the backside of the gauge cluster.
I can e-mail you the wiring diagram, if you would like. Or you can view or download any of the '68-'82 Corvette wiring diagrams from my web page.


Of course, I'm sure you have already checked all the fuses? Does the blower motor work?

|UPDATED|3/10/2014 8:11:16 PM (AZT)|/UPDATED|

I just installed my vert gauge cluster last sat. There is a silver lining, you don't have to completely remove the nuts on those 2 studs that attach it to the front of the center console. Just loosen them. The mount tabs on the console are open ended not holes. You can get a view of the nuts even with a stereo in there once you cram you head into the right spot on the floor. I used a couple of 3/8" box wrenches. One very slim with a 90 degree head....my dad calls them distributor wrenches. But I also was able to get a 1/4" drive socket on it....enough to loosen and spun it down with my finger after. But don't take the nut off!
The bad news...once its loose and you removed the side screws and wiper bezel at the top you now need to remove the e-brake housing (easy, 4 screws), and then the center console screws, which there are 2 up front under those removable side flaps. I think you can then pull the console back releasing the gauge bezel from the front of the console where those little studs are. I don't think you will need to pull the console top plate but I installed that over a month ago and can't recall if there were a couple of anchors under there or not. Do all the rest and give it a yank...you'll know. You only need to pull it reward less than half an inch to release those studs. Have fun!
Dave

Dave,

Vette looks SWEET. Merry Christmas !!! Thanks for the lowdown on how to remove the Gauge bezel. As they say "Love will find a way"

Bruce

|UPDATED|3/11/2014 8:07:05 AM (AZT)|/UPDATED|

   PINK grounds?!?
Unless you have a car made in Australia or something(), the PINK wires on the diagrams are POWER from the fuse(image 1). Pinks, or reds, are always power circuits, with Pink normally a control circuit.
Check the following sections of the wiring diagram....all of the pinks coming from the cluster come from the fuse box. You'll see the cluster ground terminating at the lower right of the diagram.
There should be a ground also right under the shift console, just rearward of the gauge cluster. It will be screwed into the metal bracket/support for the shifter/gauge console. I'll see if I can find a decent pic....don't hold yer breath tho....

       
btw...that diagram is one I made from the two pages, and just kinda spliced them together, but the PINK circuit is correct....
We try to stay away from posting LARGE images here, so I had to improvise.

Well...this is the best pic I can find  right now, but it should give you an idea of where to look. Hopefully your car is not as torn up as this one is! I was putting insulation in it at the time.




|UPDATED|3/11/2014 10:07:11 AM (AZT)|/UPDATED|

This might Help

Thanks(again!) Bob. The #3 ground(far right of the 3 circled) in that diagram is the one on the lower right corner of the diagram I posted. It is to the left of the speedo/tach cluster, below the headlight switch, screwed into the cage metal. 

Just adding my 2 cents of experience...Check ground continuity from the bird cage to the frame as well. I had this problem while restoring my car. There is a ground wire from the bird cage to the frame just behind the driver's side front wheel that can get messed up with road grime.  Good Luck!