fading ground and buzzing relay

Here's the deal... I installed four cold cathode tubes in my truck. They work find but when the dome light starts to fade the relay buzzes and sounds horrible. Does anyone know how I can stop the relay from buzzing? Here is how the relay is wired. Pin 30: fused positive constant (to battery) Pin 85: ground signal from dome light Pin 86: fused positive constant (to battery) Pin 87: to red wire of cathode transformer. Each transformer is grounded independently. Like I stated before, they work but the buzzing relay is killing the "cool" factor. Any help is appreciated.

Also, it's on a 2003 dodge ram. Thanks again.

But the ground is what triggers the relay? If I gave it a constant ground the lights would always stay on.

Scratch what I just said. I didn't see the second line of your post. Anyway, that would work but I would like to be able to turn all the lights on with the dome light, not just when the door is open. I do lots of work out of my vehicle and I installed the (white) cathodes for extra visibility. I don't want to have to open my door for them to come on. Any other ideas? Maybe a capacitor? But then as it discharges wouldn't it just do the same thing?

I will work on it.John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

Have you tried this yet?

Momentary to Constant Output

Once activated by the relay on the left, the relay's coil on the right will stay energized until either ground or 12v(+) is removed. You can do this with another relay. Or try connecting to a 12v(+) switched source instead of a constant one. Or you can have a door trigger activate a relay to break continuity. The variations are practically endless. 

https://www.the12volt.com/relays/page5.asp#mtc

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

There must be a way to bypass the fader/TimerJohn DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

I'll give the first one a try and see how it comes out. The other ideas I don't really like because they require the door to be open in order to turn the lights on. I want to be able to turn them on with the dome light switch too. Thanks for the help. If you or anyone else gets any ideas let me know. Thanks.