- 110 Pcs Aes Wave Test Lead Kit】The test lead kit is used for diagnosing, testing, and repairing complex vehicle circuits. It is an important tool for mechanics to troubleshoot the increasing number of sensors, actuators, electronic circuits, and automotive electrical appliances on vehicles. Professional test lead kits are suitable for 12v and 24v cars, RVs, trucks, ships, etc., and can also be used in laboratories, homes, and industries.