The combination switch is a part of the turn signal. A simple turn signal may not require a combination switch. When the turn signal controls other things like lights and high beams, then a combination switch is required. When something goes wrong with this switch, several operations are affected. Repairing or replacing the combination switch is an electrical job with wiring included, so some experience may be required or preferred. It is a fairly involved job, as the steering wheel must be removed. This requires a specialized tool called a steering wheel puller. Repair may also run into cruise control operations. Once the steering wheel is removed, the obstacles are few. The wiring must be disconnected from the switch. It is important to compare the old and new parts to ensure that they are identical and the part is being replaced correctly. Reverse the order to install the new switch.