Well the fact the hazards work & the brake lights work shows 95% of the wiring is good... Have you checked the fuses? The flasher next to the ashtray needs 12v with the key on... Quick question.. Are the new flashers the electronic type? Not the old mechanical design... If so they are sensitive to polarity The old style weren't... So if you remove the flasher & put a jumper in & the lights work then you need to remove the wires from the connector & reinstall them is the opposite sockets....