Hello! So my Reverse lights dont seem to turn on, my back up camera seems to not turn on, and then the letter R in the dashboard doesnt light up when in reverse. I checked all fuses containing the back up light such as IG-LH etc and seem to be working fine. My break light is working too. And also tested the light bulbs for the reverse lights with a voltimeter and seem to be working properly. This makes me think its the reverse light switch but i am having trouble find where that switch is. I have an automatic lexus is350. Original transmission.

i have been searching for an answer online but i cant seem to find any please help thank you.