I. Introduction: 1, the test stand is divided into three parts: the test console + computer console, bulb load box, electronic load + inductive load box. 2, respectively, via computer control to complete the relay voltage detection, the release voltage detection, contact voltage drop is detected, the coil current detection work, pull the time to detect the release of bounce frequency detection, the release time of testing, durability testing. Second, to meet the standards: 1, QC / T 413-2002 "automotive electrical equipment basic technical conditions." 2, QC / T 695-2002 "Car Universal Relay." 3, QC / T 419-1999 "horn relay technical conditions." 4, QC / T501-2005 "automobile signal flasher technical conditions." 5, QC / T 78-1993 "car with plug-in installation size relays and flashers." 6, QC / T 198-1995 "auto switch General technical conditions." Third, the test parameters: a DC power supply: 0 ~ 30V adjustable, 0 ~ 200A adjustable. 2, the electronic load: 10V ~ 30V adjustable, 0.1 ~ 40A adjustable. 3, inductive load: 10 ~ 30V adjustable inductor current 0 ~ 80A adjustable. Fourth, test objects: flash relays, intermittent wiper relay, fuse relay, starter relay, general relay, horn relay, etc.