KC lights relays buzzing
I recently was driving down the road and turned on my 4 KC lights (2 long range, and 2 driving. All mounted on light bar. 2 seperate circuits, switchs, and relays) and noticed they didn't turn on! I also later noticed that one of the lights lenses was shattered (not sure if relevant). I knew that my battery terminals were very corroded and giving me trouble starting sometimes so I thought maybe they were too corroded to give the lights power (lights are wired directly to battery). I also have 2 more KC lights on the bumper that are also wired to the battery but work fine. So today I cleaned the battery terminals. When I put it all back together I went to turn on the 4 lights and both relays just buzzed! They probably did it before too when i was driving but I didn't hear it. What could be a reason for BOTH relays to be buzzing??