Sorry I updated my sig to my new truck I don't have the edge anymore but i will have one in a few months, as far as the grid I'm assuming that only one is working since the volts meter doesn't drop significantly, which i had learned today reading one of moparmans posts about the grid that there is 2 of them. I live in FL and its been getting down to the low 30's at night but since I testing with the resistor that shouldn't really matter. And to test the grids and brake light switch how would i go about testing them? Also if this helps my brake light always stays on along with the abs, and airbag lights. As far as app % how can i take a reading for that without my edge I've replaced the tps under the hood in the past and made sure i calibrated it to the correct volts via the install guide.