hey does anyone know if the antenna jack is negative or postive.... this thing has the antenna jack and another wire that either needs ground or power not sure which... and if it needs power where is the best place to splice into?

Amazon.com: Car Truck AM FM Radios Powered Antenna Signals Amplifier Booster Driver: Car Electronics
this is the thing i bought... my antenna is busted and this was a hell of a lot cheaper

 

The center pin on the antenae plug is 'signal' the outside of the plug is Ground or negative. No idea what the extra cable would be for. If it is truly an amplifier it may be the 12V Postive connection assuming it needs power.

 

ok cool thanks man... that makes sense

 

bingo the antenna is a ground but u need power for an amplified antenna