Capacitors? I wonder.. Are there any electronics within this light unit? I read of LED driver ICs to control the current and hence the intensity of the light. Never had one apart meself, but I can understand that a good quality unit may have such controls, so perhaps talk of a capacitor holding charge and leaking it to cause a dim glow may be valid! And as for the 50Hz idea? Well, many LED lights are run with pulsed current, often at 50Hz. Ever passed through a road junction at night and had the illusion that the little red or green men on the pedestrian lights formed a line of little glowing men as you blink and turn your head? That's because they aren't continuously lit, but pulsed, so a LED stop light with electronic driver would employ the same technique, methinks. Anyway, to find the problem....
Disconnect the feed wire from the dimly gowing LED cluster. Does this clear the problem?
Yes? Then get a meter on the wire and see what voltage is on there. Go back to the stop-light switch on the brake pedal.. Is that leaking current in some way? Perhaps an insulation problem (Which wouldn't cause a filament bulb to glow).
No? Then the fault is within the unit, so it won't cause your car battery to go flat. If it is a capacitor leaking charge, then the glow should fade away after a short time... Try drying the unit out with a hair dryer.
I want to get my hands on one of these now!
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