Check the solenoid that actuates the ice maker, there is also an inlet valve that controls water on ice maker lines, test that is not faulty by energizing it and reading continuity on valve solenoid.
If you still cannot find out why the ice maker is not starting, double check the wirings to ice maker.

Help yourself with the documentation below, click to open:

Wiring Diagram:



Schematics:

Http://www.applianceaid.com/icemaker.html
click the link.

1. Amana/Maytag bottom freezer icemaker tip
2. Fill valve "cheater" cord test
   
3. Flexi style ice makers
   
4. GE style newer icemakers
   
5. Help for accessing/changing a common icemaker fill valve
   
6. Hollow ice cubes
   
7. How much water should a common icemaker fill up with?
   
8. Ice maker troubles - won't fill with water
   
9. Ice Maker is overflowing and leaking into the ice bucket
   
10. I would like to install my own water line for my icemaker
    
11. Installing a shut off valve help
    
12. Ice maker odor troubles and what can be done to help with them
    
13. Important Disclaimer
    
14. Module style icemaker service information - many fridge's use this style of a icemaker
    
15. My Ice maker and water dispenser are starting to slow down on filling with water
    
16. My water dispenser has white flecks in the water...what's up?
    
17. Older style icemakers common problem
    
18. Where is the water filling adjustment made?
    
19. "Y" hose for icemaker broken helps - especially Amana
    

Hi!

Look for a wire along the right side of the ice maker that looks a bit like a coat hanger. If this wire is in the raised position, the ice maker is turned off. On some units you simply lower the wire to the down position to turn the ice maker on. On others, you lower a small red plastic lever to lower the wire. If the wire is in the proper position check the freezer temperature, it should be between 0-8 degrees Fahrenheit. If it is warmer than 10-12 degrees, the ice maker may not produce any ice.

Water for fridge and ice maker are the same , so the water valve is working the problem is in the head of the ice maker, when you unplug any ice maker you need to put it in what they call neutral, also you may want to check that when you did the arm nothing got jammed, as far as the water freezing in the tube, that doesnt happen too often, and if that was your problem it would have been acting up before this also, thank you for using fixya.com any other time i may help just let me know, have a wonderfull day.

I have a queston: Since you just repaired the 'on/off' arm, I'd start there first - can you hear an audible click from it? have you tried testing it with a continuity or ohm meter to make sure the switch is working as it should?