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West Virginia Formula - Randy's Electrical Corner

By Randy
Photography by Randy
West Virginia Formula Randys Electircal Corner Randy.Gif

West Virginia Formula Randys Electircal Corner Formula.Gif
We know the watts of the bulb from what it says on it. Let's say it is a 100-watt bulb. and volts are always 14.7 in a Jeep, so what we don't know are the amps. I always draw the circle with W, V, and a in it, then circle what I know. In this case, it means divide the wattage of the light bulb by the volts to find the amps-in this case, 6.8 amps.
West Virginia Formula Randys Electircal Corner Fuse Box.Gif
No matter what, always round up. That 6.8 amps means you need to put at least a 10-amp fuse on that 100-watt light. You can also figure out if your stock fuse will be enough for aftermarket headlights this way. Don't replace the fuse if it's not! The fuses and wires in the Jeep can only handle so much amperage before they melt or burn. Next month, I'll show how to wire the light and choose the right wire size.

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