Random lights on rear out, no dash warning
So I noticed a few weeks ago that my passenger side reverse light was out. Okay just needs a new bulb. Pop it open and bulb is fine. However a little corrosion was present so I clean it up and put the bulb in. Nothing. Try a new bulb, nothing.
Fast forward 2 weeks and my wife tells me one of my driver side marker lights is out. No dash light showing me rocket boosters. Check the bulb it's fine as well.
So two random lights that don't work, and no dash warning light, what gives? Yes I had the recall fixed for the grounding issues in the tail lights. I have a multi meter, how can I check for power and such?