Quote:
Originally Posted by wild man
The (hot) resistance of a brake light bulb should be around 6-7 ohms (25W). But it is very possible that the circuit could be tripped by a (much?) higher resistance. The question still remains:
What is the highest value of resistance that will trip it every time?
|
Unless you ride the brakes, which is surely a bad practice, power consumption should be a non-issue in this case.
That said, you are surely right in your assumption that a fairly high resistance will work. No need to emulate the lamp resistance (and if it was, it is the cold resistance which is relevant here, which is much lower than what you specify). It is very easy to verify, just by measuring the voltage of the brake lamp circuit when the brakes are not engaged. I am not sure what the switch voltage is, but if you see a voltage below, say, 0.2V, I would be very comfortable it is good enough.