Bulb Failure Warning.
On Saturday I was getting a random "Number plate light failure" warning, which cleared if I switched the lights on.
Had a look when I got home - both number plate lights working OK & more or less the same brightness. However, I decided to have better look this morning & check for loose bulbs, etc. What I found was that the glass of one bulb was darkened, indicating that the filament was on its way out.
The old bulb had a resistance of 2.6 ohms, compared with 3.4 for a new one. As it seems OK with a new bulb, I'm guessing that the check system looks at resistance in each circuit & triggers a fault signal when it varies significantly from the expected value. Sound plausible?
Where are we going & why am I in this handcart?