Your best bet is to:
1. Consult your owner's manual: This is the most reliable source of information. The manual should have a diagram of the fuse box locations and what each fuse protects.
2. Look in the underhood fuse block: The fuse block is usually located near the battery, often under a plastic cover. The cover should have a diagram showing the fuse layout. Look for a fuse labeled "Power Outlet," "Accessory," "Cigarette Lighter," or something similar. If you don't see it labeled directly, you may need to test each fuse with a multimeter.
3. Check the interior fuse panel (if applicable): Some vehicles have an additional fuse panel inside the cabin, often located under the dash or in the glove box. Check this as well, but the underhood is more likely to house the cigarette lighter fuse.
Important Note: Always turn off the ignition before checking or replacing fuses.
Without the owner's manual, locating the correct fuse might require some trial and error, and using a multimeter to test the continuity of the circuit will be helpful. If you're not comfortable working with car electrical systems, it's best to take your Lumina to a qualified mechanic.