Tony_1992
Active LVC Member
Hey guys, I'm recently adding an aftermarket touch screen stereo radio, with back up cam. Everything works fine except that the screen doesn't automatically switch to reverse view when I switch to reverse mode, which is weird. So I checked up the voltage signal of reverse light, and I found something.
When the car is in not in reverse mode, the positive(+) and negative(-) pins of reverse light are both 12V to the ground(chassis), so that there's no voltage across the light bulb so it doesn't work. And when I turn the car into reverse mode, the negative pin of reverse light becomes 0V, thus lights up the light bulb.
But here's the thing, the stereo radio only recognize 12V as a effective signal for altering to reverse view, which means it'll never work as expected due to the electric design of Lincoln LS.
I really cannot understand why they design the electric system like that. Shouldn't it be better to use 12 as a triggering signal, rather than a inverted scheme(negative as triggering signal).
By the way, does anybody have any idea where to find a really high-voltage-triggering 12V, when the car is switched into reverse mode?
Thank you!
When the car is in not in reverse mode, the positive(+) and negative(-) pins of reverse light are both 12V to the ground(chassis), so that there's no voltage across the light bulb so it doesn't work. And when I turn the car into reverse mode, the negative pin of reverse light becomes 0V, thus lights up the light bulb.
But here's the thing, the stereo radio only recognize 12V as a effective signal for altering to reverse view, which means it'll never work as expected due to the electric design of Lincoln LS.
I really cannot understand why they design the electric system like that. Shouldn't it be better to use 12 as a triggering signal, rather than a inverted scheme(negative as triggering signal).
By the way, does anybody have any idea where to find a really high-voltage-triggering 12V, when the car is switched into reverse mode?
Thank you!