To begin with, the turn signal flasher, located in the
Fuse block, controls the blinking of turn signals. If one side fails, it may indicate a faulty bulb. If both sides fail, it could be a blown fuse, faulty flasher, broken switch, or loose connection. To replace, pull out the old flasher and ensure the new one matches before installing. Also, the hazard flasher, also in the fuse block, controls all four signals. It's checked and replaced similarly. To replace, disconnect the negative battery cable and the replacement steps are similar.