SE Expedition Society
When I first started playing with the lights on my motorcycles, MINIs, & Jeeps, I used spectrum analyzers and oscilloscopes from the lab here to chart the PWM duty cycles (when applicable) and also hunt/seek any spurious RF created by the lights. RF, whether transmitted or conducted, can play havoc with modern systems and manufacturers spend good time and money making sure their products are protected from it with OE systems.Several acquaintances have recently installed LED lights and discovered that radio frequency interference from those lights is wreaking havoc with their CB and Ham radios. Since LED auxiliary lighting is now so popular, it would be helpful if someone with expert knowledge and real life experience could address this issue.
My solution, thus far, has been to avoid all aftermarket LED lighting
Trucklite and JW Speaker lights had no harmful spurious RF. Many of the cheap and stinky HID and LED lights have also been relatively safe.
But I have found some interesting signals generated by many of the cheap HIDs and LEDs that can make a vehicle's computer behave in unwanted ways ---- rolling down windows, activating power steering, opening the trunk, and the usual radio interference.
Have your acquaintances try ferrite chokes and move their grounds. If you can't isolate the problem, choke it. Even the OEs often use a choke.