I have a 2001 coupe and driving it in the dark I noticed the rear interior courtesy light glows when it should be off.
All of my interior bulbs are LED but only this one glows. It also glows with the ignition off and the car locked.

Any suggestions where I should start looking for a leaking switch or relay?

thanks
Kevin

 

It happens. It takes so little to run an LED light that,,,, I don't like it either. Last week I replaced those two little cat eyes in the headlights, the tiny ones in the upper and inner corner. A blue to match the Blu of the car. I was pleased. Turned off the car and they remained in just the little littlest bit. I left them BUT it makes me uncomfortable to this moment... I am super interested in hearing what others have to say.

 

No switches or relays: it's driven by the BPM directly on the same dimmer circuit as the footwell lamps. As Jay states, they require so little current to drive them.
Bear in mind that the tiny leakage was always there, just not enough to make a normal incandescent lamp glow.

I suspect it will eventually extinguish when the car goes into sleep mode. The LEDs in both my front sidemarkers and sidelamps do this. It's just a consequence of doing something that the original designers didn't anticipate.

 

If it bothers you, you could wire a resistor in parallel with the LED - you need a similar value to the resistance of a normal bulb - maybe 150 ohms or so = 1 watt approx.

 

I have used the so called CANbus compatible LEDs that have a resistor build into them. That eliminated the glow in my case.