To find the correct fuse:
1. Consult your owner's manual: This is the most reliable way. The manual will have a diagram of both fuse boxes showing which fuse controls which circuit. Look for fuses labeled "power outlet," "accessory," "cigarette lighter," or something similar. There might be multiple fuses for different outlets.
2. Check both fuse boxes: The underhood fuse box is usually located under the hood (duh!), often near the battery. The interior fuse box is typically located under the dashboard, sometimes in a panel that you need to remove.
Without your owner's manual, I cannot give you a precise location. The fuse numbers and locations vary slightly even within the same year and model due to options and regional variations.