Second 12v (C. Lighter) wiring

[sen2two]

Im installing a second cigarette lighter to be able to run some things like a lap. another reason is i have no radio in my car for the weight reason, along with gauges, switches, ect, are in the spot where a radio would normally go. but since i drive this car to meets and work sometimes. i would like a radio. so i created a cheap simple removable set up. it consists of ordinary 110v computer speakers (high quality with good sounds/bass). An I pod and an inverter that simply plugs into a 12v cigarette lighter and converts into 110v power. i already tested it out in another car and worked great. and the speakers sounded like the car had an exspensive music system, lol...

but the cigarette lighter in my car dosnt work. tried tracing out the problem with no luck. either way, i dont want to have the inverter sitting there bumping my fist when i shift. so im wanting to install a second one in a remote location.

when i tryed wiring it strait to the battery so it works with the car off or on, it just keeps popping the 10amp fuse within the inverter. i thought i could just wire it srait to the battery for 12v power, and ground it.

what am i missing here???