i just picked up a 99 4 door and it already had a jvc deck in it but none of the speakers worked. so i replaced the 6.5 in each door with a three way pioneer and only the front worked. so i ran new speaker wires from the deck and ran it under the interior panels and carpet and into the doors. after that i found out that there were a pair of 4x10's in the rear roof so i plan to run an amp ( amp wireing including rcas already done when i got it ) and use the amp to run a pair of 6x9's in place of the 4x10's, and one 12 inch sub with a crossover. the 12 is going to go into a cabinet im making to fit where the jack and tools were stored in the left side compartment. ill be running new wires to the 6x9s from the amp so i wont need the factory amp anyway. i have read about using jumper wires to either bypass the factory amp, or splice it in to make it run the rest of the speakers on the factory wireing. iv installed hundreds of systems big and small in all kinds of vehicles over the years and i prefer new wireing where i can cause its new, i can trust it will last if done right. i just installed a siren where the factory cd player was in the dash and will be building a wood center console to replace the factory one but ill be adding a radio and switch panel rack with more power options. its going to have to get a dule battery kit and high amp alternator down the road when i add a winch and other electronics, lights ect. may get brave and add an under hood welder if i can round up the scratch. anyway im rambeling. the amp being used just to run the factory stuff fine but aftermarket always has better sound to me
