heater/fusebox

Try looking in the owner's manual for a diagram of the fuse box and fuse ratings. If you don't have a manual check online, autozone's web site have electrical diagrams in their "repair guides" section. Make sure fuses are correct, never put a higher-rated fuse in a slot, it can cause overheating of wires or fires. Regarding the blower only working on high, that's usually caused by a "blower motor resistor pack" failing. The lower settings direct electrical power to resistor pack to reduce voltage, the highest setting applies electrical power directly to the blower motor skipping the pack. The "clicking noise" is the starter, and yes, it is likely the battery is too weak to start it, cold weather can kill a battery. If it's not taking a charge it may be time for a new one. Take it to any auto parts store and have it tested. If you need a new one, they'll even install it for you, and they require the old one as a core deposit. Good luck!

I do not have the manual I couldn't find it on autozone either. I found one similar but not exactly. Regarding the heat/ac not blowing out on high anymore....it randomly started blowing when I was driving. Any ideas?