so my lancer came with tail lights that have 4 bulbs. 2 brakes a reverse and a turn signal. i just bought a new set of black anzo tail lights that only have 3 lights. 2 brakes one of which being a turn and a backup light. they didnt send me a wire harness with the item. is there any way to get a wire harness or rig my old harness to work or maybe even make my own harness?

 

Just Fabricate a wiring and does your aftermarket tail light FIT the old housing of the stock lights.

 

It does fit perfectly. Will it be hard to make a harness for it? because i cant just use my old one and cap off one of the lights

 

You may do that but always used the voltage regulator to check on the wiring if they are good or not. The regulator is use by electrician if the wiring are live or dead.

You may used new wires if you can't use the old ones. Make sure the voltage of the tail lights are the same because if NOT one tail will be brighter than the other one.

Just to make sure if you are doing it right is to ask help from a car electrician.

Car wirings are complicated sometimes when step on the brake the reverse light comes on or when you turn left the brakes lights comes on blinking like a turn signal light.

good luck and someone might answer your questions better done mine.
18 is the thickest wire the higher the number the thinner the wiring.
you can buy those at PEP Boys or any auto shop.

If you really not sure Best Buy Installation dept can help you. They have electrician that install sub-woofer, car stereo and other electronics. They might able to rewire your tail light for you with a small fee

you just have to talk to them. I usually go to best buy if I have electrical problems on my car.