Hot system has excellent customer service and took care of my concerns regarding the switch and it's functionality. Please understand the ground switch to get it to light up before installing it. I blew some fuses before learning what was going wrong. On another note, the switch says "hot system" on the front. Not a deal breaker, but again not mentioned in the product description and kind of a bummer.As previously stated, Hot system was addressed my concerns and was easy to work with, I just didn't ask the right questions prior to purchasing.