Oh, as I recall, the line with the valve is blue tubing.

Lilyred, I apologize! I haven't been reading irv2 for a while. If you have a Diplomat SFT, put the full wall slide out. In the very back, there is a removable panel near the floor on the right hand side beneath the cabinet that would hold the washer/dryer. Remove this access panel; it just pops off. Find the tube that has an inline valve. That leads to your ice maker. The factory turns if off after they winterized the line. Your first few trays of ice will be pink. Discard these.
Again, sorry for the delay.
Buddy Parrish

Hi. I'm new to iRV2, haven't introduced myself yet. Actually been searching for icemaker problem solving. Noticed you mentioned the valve to "turn on the icemaker is under the washer/dryer" but I couldn't find that post in my search and now I'm tired. Could you tell me if you meant under the w/d cabinate or where. I have the place for a w/d but didn't get it since the prior owner had taken it out due to the weight and not using it much. We haven't been able to get ice. The maker makes a noise like it is "on" but no water comes into it. Water is in the tube leading to it but the tray doesn't fill. So I am problem shooting and saw your post. We have a 2000 or 2001 Monaco Knight. Thank you for any help. You guys are the best, from what I've seen so far. We haven't made any trips yet, except for one three night stay close to home. That was our practice run. Ha. I'm a little nervous/confused/lost. We're ready to go but don't know where to. Ha.