Let me tell you dude your going to spend as much replacing those modules all the time as you would if you just went and wired that bike completely over and ripped all the electrical out of it and did it w/ Harley Color Coded Wiring and its clip in and anyone knows how to work on Harley wiring those modules are $350 a piece I have what was an 03 Chopper and I changed out the electrical in that bike soon as I got it sucks. So that is my suggestion you will find out my advice is best advice you could get. Good Luck w/ it.
As expensive as it is, just get the wire plus unit, it's plug and play on the 03. Hardest part is getting it all in a tight space and looking good. Replaced mine last year and hadn't had any issues since. Make it easy on yourself!