1 is the turnsignal fuse good?
if yes check for power at the switch in and out if the switch has no output replace it....
window motor
again check for power at the switch in and out if you have power to the motor and it won't move replace the motor if you dan't have power to the motor replace the switch
you can run one big power wire to a junction block and split it in the back
I would wire it all up normal and then see if the lights dim when it hits you might need to get a cap or custom alt, but your stock stuff should cover two amps ok