I have an 03 ultra classic. We have an aftermarket radio & recently installed hog tunes. Since installing hog tunes my radio sound cut out when applied the throttle and came back on when pulled the front brake. The radio itself didn't cutout. I could change the Channel's & volume, just didn't have sound. I took it to a stereo installation person & he couldn't figure it out. He found loose wire & thought it was solved. Within 1 day it cutout. Took it back. He thought my current radio was junk so he installed a new radio but within 10miles of leaving his shop it happened again. I researched online for weeks. So glad I found this feed it solved my problem. It was the BATTERY. My husband was skeptical but once we replaced the battery we had no more issues. My voltage meter was reading the same, no changes when applying throttle or brake. This is the most expensive radio I have ever bought! Had it installed in Sturgis. That guy wired my hand controls wrong. I paid for diagnostics to fix his mistakes as well as diagnostics to figure out this issue & paid for new radio I didn't need.
Edit: It is a plug and play however it is a swi-rc which required programming for hand controls to work correctly. So it was the programming that the sturgis guy did not do correctly. The new guy re programmed hand controls for me. As far as the wiring for the hogtunes, he did follow the wires and he corrected those as well. He thought radio was junk because he had never come across this issue of when applying the throttle the radio cut out so he thought problem with my radio. When that didnt work his next step was to contact hogtunes but i read online about replacing the battery & thats what i did & it worked. Neither of us understand why it fixed it.