Electricity is easy. From the sound of it your front signals are working properly. They should plug in seperately from your rear signals. Your rear signals and brake light should be part of the same wiring harness, if not then close by. You shouldn't have to mess with your front signals anymore, so from here you need to remember Black is almost always ground, now you need to find constant voltage and applied voltage. Those should be the other two wires. It sounds like you just have them hooked up wrong, or backwards. You should be able to just play with those wires until the setup is right. As for the rear blinkers you should only have to use two wires. Ground and applied voltage. The other wire is probably for a resistor to be put in parallel with the circuit to slow the blinking rate. This is only necessary if you think it is. Almost all turn signals and brake lights are wired and work the same. Check your fuses after you rewire, to make sure you didnt blow any from wiring it incorrectly.