Helping friend troubleshoot CB problem on his 2011 CVO Road Glide, FLHTRUSE, and we’re stumped. Problem: when transmitting there is a squeal noticeable to him as the rider and to those who are receiving his transmission. Only does this when engine running - sometimes at idle, sometimes not. But when riding the intensity of the squeal varies with engine rpm – higher rmp = more squeal. I thought it was some kind of electrical interference. Here’s what we’ve checked and done:
Checked all connections to be secure and not corroded – all ok.
Replaced CB module with used one procured from Fallen Cycles – no effect.
Changed spark plugs and spark plug wires – no effect.
Run a ground wire from the CB module mounting screw to the bike’s frame.
Switched helmet headsets and cables - no effect.
None of the above have made any improvement to the problem. We’ve considered the PTT switch itself or even the wiring and wonder if there is a way to check these before going any further.
Suggestions appreciated.