I have recently installed LED flood lamps on my 2001 Ford E-250 RB50.
I have noticed when the LED flood lamps are on, the radio has high white noise
And at times, I have noticed when a phone is connected to a USB charger
, making a phone call, or listening to listening to audio (YouTube, Pandora), white noise
is heard here as well.
For the USB Charger
, a simple solution has a Ferret Core:
RAVPower RP-VC006 Red USB Car Charger
And place a ferret core
near the LED flood power:
Ferrite Core Bead Choke Ring Cord RFI EMI Noise Suppressor