1967 Fleetwood 75 Clock-- no power to clock?

[Cadillac Nut]

Hi,
I have a good functioning clock, have tested it with an external power source, works fines.  It's been ran for 2 days and keeps good time.  However, when I install it in the car it doesn't work.  My first thought would be not getting power.  Everything else in the dash and inside the car works.  I had the dash out, printed circuit looks fine, all wiring is in good shape.  Anyone have any ideas or suggestions?

Thanks,
Garrett

[Dave Shepherd]

12v and a ground to the clock?

[Cadillac Nut]

The power to the clock is provided by the printed circuit.  I have no idea how to test it, but everything else connected to it works fine, and there are no tears or anything that would look like a problem. I had the whole dash out of the car.  Clock is grounded by the metal casing.   When I had the clock out of the car, I connected one lead to the post on the back and one to the metal face, starts and runs fine.   

[Dave Shepherd]

Well either the printed circuit is bad, not providing 12v to the clock or it is not grounded, no other answer based on your findings.

[cadillactim]

Make sure the copper part of the mylar circuit that connects to the clock post is not corroded. Take some steel wool or fine sandpaper and clean the copper part. Take a voltmeter or test light and make sure battery voltage is at that part of the mylar circuit.

Tim

[Cadillac Nut]

Thanks.  The clock casing grounds to the back of the dash, that seems to be fine.   I just cleaned the copper part of the printed circuit today.   Didn't do anything.  Should there be a copper washer between the clock post and the back of the printed circuit?  I tried a voltmeter, didn't do anything, but then I connected it to something I know works and it didn't do anything either.  So I must not be connecting it right.  This is the height of ignorance, but, how do I connect the voltmeter? 

Garrett

[Dave Shepherd]

Red to what you assume is is power/12v and black to a known ground.

[Cadillac Nut]

That's what I thought & that's how I tested it.  My voltmeter may be bad, I will try it with another one I have.