Ok I've changed my interior lights to LED and know I've noticed that the back dome light stays on when the lights are off. It's only like a third of the power. I've changed the bulb back to the old bulb and it doesn't light up at all and I've put another led in it and it didn't change anything. Anyone else noticed this in there truck.

 

Mine doesn't do that make sure your setting switch for the dome light is fully seated into whatever setting you like

 

It is but it won't light up with the factory bulb in, that's what confuses me.

 

LEDs take very little energy to light up. Some will have a little light even when they should be off. I have a couple that have a little blow yo them when off.

 

Be that as it may, this is not the way it should work. This indicates you have leakage through the switch or through a relay or arcing across a relay terminal, so don't dismiss this as normal. When you turn the switch off there should be no "0" voltage across that switch. I have LEDs in my other vehicles and they don't exhibit this result when the lights are turned off.

 

I have the same problem, I always figured this is why ^