intermittent speedo

It's been colder than usual here and I noticed the past couple of mornings, my speedo doesn't work (sits on zero) for the first couple of minutes I'm driving.

this is in the 91 OCC.

any ideas or is the cluster on the way out? (tach stays pegged to the right all the time).

Hey Sprocket my 91 OCC does the same thing every winter.Mostly the tach stays on zero until I tap on the plastic
lense a few times and then it starts working.I dont think anythings going bad just getting old and stiff kinda like we
get as we age.Strange how some parts start getting stiffer as we age and other parts wont get as stiff as they use
too.
Jusr Rambling
Jim Gordon

we'll see how it holds up this weekend. I'm going to put about 700 miles on it....

There are two things you can look at.

First, the contacts for the gauge motors may be getting some corrosion on them. You can fix this by just R&Ring the circuit board on the back of the cluster. Just pulling it off and reinstalling it would scrape the prongs on the gauge motos, and remove the corrosion.

Second, the circuit board may have a fried or loose part (especially with the tach issue). You can use the circuit board from any 91-93 RMW/S or 91-92 OCC to replace the old board.

In either of these scenerios, you also have a chance to make sure you have good bulbs in all of the sockets at the same time.

I had a tach which would only read 0 or 7K. I replaced the board and it now works perfectly.

Yeah I have a few TBI clusters about OCC and RMW. just no time to fitz with it right now.....
seemed to work on every start after a few minutes in the morning.