justin9,
Have you looked in the fuse box out in the engine compartment? There's a large fuse box under the rear air filter boxes called the "Power Distribution Center". Fuse number 19 says it's a 20 amp and it's for "Power Outlets". It's in your Owners Manual on pages 231 and 232 in the Maintenance section. As MX-5 says; "read your owners manual"
