2011 Honda Pilot. Washed my Pilot today, then I went to pick up my son and the trunk indicator light came on, then started flashing off and on, so I pulled over, open and closed the trunk, the light went off, but a few minutes later, it flashed on and off again before it stayed off/closed. It didn't come on the 2miles home, thought the problem was resolved. Came out to the garage an hour later and the lights inside were on so I got in, turned on the car and the indicator lights on again, showing trunk wasn't closed. Any ideas?