How do you change the back three spark plugs on a 2006 Grand Caravan?

I just did them last night on a a 2001 Town and Country. I did it all from the top and didn't have to dismantle anything. I reached around the top of the engine with my right arm and felt for the plug wires and just removed one at a time so I would not loose track of where I was working. It only took me about 30 mins to do all 3 on the back side. But my arms were scuffed up a bit from the tight openings.

Thank you very much. I did get mine changed the way you said, I also scuffed up my hand. I have been meaning to call the dealer just to see what they would charge thus seeing what I saved. Thanks again. . . chazgof.

I also changed mine by reaching around and over the engine and did end up scraping my forearms. Many recommend removing the wiper cowling to facilitate easy access and to be able to see what you are doing. My concern doing it 'blind' was the increased possibility of knocking some junk into the plug holes. Also, you cannot torque to specs if you can't see in there or attach a torque wrench. If I have the van long enough to replace them again - I installed Champion Double Platinum about 7- 8K kilometers ago - I'll remove the wiper cowling.

definitely take the 15 mins to pull off the wiper assembly... not sure I would have been able to break loose the plugs otherwise...