Car Repair Questions Answered for Free by Professional Got a car repair question? 2CarPros will answer your question for free by providing information that will help solve your problem quickly. P0480 Cooling Fan Relay 1 Control Circuit Open the fuse block and inspect the cooling fan relay fuses. If they are good pull the cooling fan relays out. The bottom of the fuse block lid will usually indicate placement, but if not, look in the owner's manual. The vehicle's PCM's function is to act as a ground to operate components, not to supply power. Understanding Battery Configurations | Battery Stuff Jan 24, 2016In general the manufacturer will recommend a fuse to use based on the size of the inverter, so I would look for their recommendation. We do sell inverter installation kits and depending on the one chosen it will come with a 150A or a 200A fuse based on the size of the inverter.