SnowDogg Part # 16160512 - Harness Dust Cap for Lights SnowDogg harness cap covers the connector port which attaches to the lights on the side of the plow for your SnowDogg snow plow. This is a very common part and is used on almost all SnowDogg plows. Youll find this dust cap on the plow side of your truck. Protect your wiring harness from corrosion and moisture from damaging the pins.