Billcody1960 Posted May 1, 2020 Share Posted May 1, 2020 I have a 2015 Mack cxu613. When I cycle the key to on CB radio makes a loud squelch noise to the left and right speakers. And then occasionally intermittently when driving it will make that same sound. I do not have a CB radio installed so I'm unsure what is causing the interference. Here is what it sounds like.. Voice_132.amr Quote Link to comment Share on other sites More sharing options...
Mack Technician Posted May 6, 2020 Share Posted May 6, 2020 Cheap LEDs will cause that. Does it do it with the lights all off? Quote Link to comment Share on other sites More sharing options...
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