ALL,
Here is a "Super Duper" way to power a fan in a Norcold 1210 refer and a Model 1200 too. It's Super Duper because the fan will run when the doors are closed but will automatically stop running when you open either door.
See my PS if you have a Norcold Model 1200.
First, here is the type of fan I have but this will work with any 12 V fan.
http://www.ebay.com/itm/DOMETIC-NORCOLD-REFRIGERATOR-FAN-FOR-RV-12-VOLT-/261566007431
The ground wire is clipped onto a FIN so it's easy.
For a Norcold Model 1210, the positive wire goes down into the defrost tray, so it does not show, and over to the left side wall of the refer. From there it goes out toward the left door jam in a channel that is on the left side of the refer wall. I used this channel so it does not show. It looks better this way.
From there, using white colored tape for looks, the wire goes across to the door jam toward the bottom circular contact that is in the door jam wall. When you look at the left door itself you will see 3 pins that push in when the door is closed and 3 circular contacts to which these 3 pins connect when the door is closed.
Now strip an inch of insulation off so you can place the bare wire across the bottom most circular contact. Twist the wire and squeeze it so it is a little flat. Finally, tape both sides of the wire, that is going across the bottom most contact, so the bare wire will stay in place on top of the contact. In this case you tape one side that still has insulation on it the other side is the bare wire that goes beyond the circular contact. Do NOT cover the contact/wire with tape. You now have the +12V bare wire going across the bottom most contact. That's it you're done.
This really works well with our Norcold 1210...close door fan runs open door fan stops.
JerryF
PS, I did the same thing with our previous Norcold 1200 refer BUT with the Model 1200 it was even easier because I was able to connect the 12V power to the inside ceiling light. BTW, I was disappointed that the ceiling light connection did not work in our newer Model 1210.