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Reply to "Fuses"

Ok, I see the two fans. In my setup, each fan has a 30A fuse. Without knowing how your wiring is set up, you need a minimum of a 30A fuse, and make sure your fuse connections at the panel are bright and free of tarnish. Use a pencil eraser to polish them up.

Several factors that can increase the current (amperage) through a device that can blow a fuse: Resistance because of corroded connections. Resistance because of heat in the wires (hot day or high current draw). Low voltage from the charging system because of inadequate alternator. If you have low voltage, then the high power devices (fans) make up for it by drawing more (fuse blowing) amperage.
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