I. Introduction: 1, to achieve a combination of toggle switches, screwing, lift move, reset function to detect motion. Parameters can be set by software. 2, each gear contacts on, off and with load performance test; 3, automatically determine the contact failure conditions, and can show which switch and contact problems; 4, failure to set contact pressure drop through the set drop value or number of failures to determine product test results and print test reports; 5, divided into high and low temperature test bed type (-40 ~ 120 ℃, 10 ~ 95% RH), servo motor driven, stepper motor drive Type a variety of series 6 \, the device can be the same or different types of three endurance test switch simultaneously. Second, to meet the standards: 1, QC / T 218-2002 "automotive combination switch on the steering column technical conditions." 2, QC / T 198-1995 "auto switch General technical conditions." 3, JB 3126-82 "auto switch General technical conditions." Third, the test parameters: a DC power supply: 0 ~ 30V adjustable, 0 ~ 50A adjustable. 2, screwing angle: 0 to 360 degrees, accuracy: ± 0.5 degrees. 3, 0 ~ 100mm adjustable toggle, press 0 ~ 20mm adjustable. Fourth, the test subjects: Automotive combination switch (include: turn signal switch, dimmer switch, wiper switch, cruise switch, washing switch, horn button switch, lighting switch assembly).