[scuba0100]

I don't think that there is a "parking brake sensor" persay but there is a parking brake warning switch and an ABS Sensor Block. the only reason they want you plug into that one is because it's a "safetly precaution" so that unless you have the parking brake on which toggles ground to complete it's circut then your screen won't work. You should be able to just use any good ground. I Have a list of factory grounds if you let me know where you are installing the screen i might be able to find the closest (-)