It's possible to fix an air conditioner's wiring using a diagram, but proper safety is essential for avoiding burns and electrocution. Learning what the different colors on wires mean can help ensure safety.
Before performing any repairs, it is essential to ensure that the power is disconnected to the system. Using a voltage detector can show that the electrical line is disconnected. It is also important to learn what capacitors look like, as capacitors store charges even after power has been disconnected and must be discharged safely. Look into local building code laws related to wiring, as non-compliance can cause a home to fail inspection.