In recent years, China has maintained bike market grew by leaps and bounds. Data show that in 1998 the national production of only 54,000, to 1.58 million in 2002, to the 2003 Chinese electric bicycle production reached more than 400 million, ranks first in the world from 1998 to 2004 the average annual growth rate of more than 120% . 2009 production reached 23.69 million, an increase of 8.2%. 1998 compared to an increase of 437 times, the pace of development is quite amazing. These statistics electric bicycle production year average annual growth rate of about 174%. Failure to use the electric car electric car fault diagnosis are the following nine directions: 1) no electricity electric passenger tricycle vehicle manufacturers, how to check the first check there is no electricity supply wholesale electric passenger tricycle, if not then to see if the fuse is good? If the fuse is normal, no power supply, check the power of the internal electrode wire is loose, the battery is disconnected. If the power supply, check the power cord and power locks are normal. 2) an electric vehicle, the motor does not turn how to check? Will be transferred to the positive turn red and yellow lines shorted the speed controller, if the motor is operating normally closed electric passenger tricycle, the motor and the controller is good, if motor does not turn, the motor controller is bad or worse if the motor and the controller is normal, the motor does not turn, it may be transferred to the brake handle problems. Electric passenger tricycle Wholesale | White Dragon Machinery (certified) | electric passenger tricycle provided by White Dragon Shandong Machinery Co. White Dragon Shandong Machinery Co., Ltd. (www.bailonggrp.com) Shandong Linyi, bicycles, tricycles and accessories leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the White Dragon machinery leadership with the staff warmly welcome all inquiries negotiations to create a better future for White Dragon machinery.