Below is a link to the tech sheet.
It is too big to upload here so I had to use a third party site.
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Download MDB7709.pdf

Note the 7709 tech sheet is the same as the 6609.

Here are your parts

Another question, sorry you have 6609 is the same as the 7709 I have the 6709, the reason I ask is I'm using my fluke set on diode and using the probes as the diagram shows and get no reading at any switch nor with the diode checker either, and when counting the pins left to right is 1-14 on the pins when looking at the side with the pins exposed on the back of the p1??

[COLOR="Blue"]Another question, sorry you have 6609 is the same as the 7709 I have the 6709,[/COLOR]
Sorry this was a typo, should be "Note the 7709 tech sheet is the same as the 6709"
[COLOR="Blue"]
the reason I ask is I'm using my fluke set on diode and using the probes as the diagram shows and get no reading at any switch nor with the diode checker either, [/COLOR]
Use the resistance scale.
Before you start short the meter leads together.
This does a couple things.
It checks that the meter is OK
It also shows if there is a zero offset in the meter.

and when counting the pins left to right is 1-14 on the pins when looking at the side with the pins exposed on the back of the p1??
Sorry you lost me here.
Often pin 1 or 0 will have a line printed on the ribbon cable.
Or it may be marked on the plug (an X or something like that).

[COLOR="Blue"]also on the ribbon are the wp#W10240120 rev.B06/02/10[/COLOR]
Nothing comes up when I search using the above part number.
Most likely this is an in house number. It is used by them to make an assembly but is not available as a separate part.

[COLOR="Blue"]I did find an arrow on the back of the P1 on the extreme left so assuming that as 0 or 1[/COLOR]
I also would assume that this is pin 1.

Looks like it is a 15 track ribbon cable but with a 14 pin connector.
I would say that pin 0 is the track that is not connected into the connector (left hand side in your picture).
I cannot explain what is going on.
Have you tried reversing the leads on any of the switches you are trying to read?
The unit has diodes in it so polarity is important as the diode has to be forward biased to give you a reading.
Also try using a higher resistance scale (200K).

It would be very very weird for them all to go out at the same time, at least I have never seen it.

I also double checked I was making contact at the points I referanced with a paperclip inserted in the end of the P1 and the contact on back meter shows continuity also??