Powering Your Jayco - 12V & 240V options - YouTube Nov 16, 2010Get to know where to find switches, your Jayco's battery, transformer, fuses and where to connect 240 volts. Also, discover how to monitor and maintain the health of your van's battery. Category Where is the 12volt dc fuse panel located on a 2017 Jayco Apr 06, 2018Where is the 12volt dc fuse panel located on a 2017 Jayco 29 w grayhawk. No just know where the120 panel is, at the toe - Answered by a verified RV Mechanic. We can't find the fuse box. We called Jayco for an answer and it is not located where they said it was.