Pico-CAN-Test-Box-PP619-Pico-PP619-The-CAN-test-box-gives-you-easy-access-to-the-16-pins-of-the-diagnostic-connector-that-is-fitted-to-all-modern-vehicles-Depending-on-the-configuration-of-the-vehicle-this-may-allow-you-to-check-power-ground-&-CAN-Bus-signal-quality-The-CAN-test-box-uses-numbered-backlit-LEDs-which-illuminate-when-signal-data-is-present-on-the-corresponding-pin-of-the-DLC-Pulsing-LEDs-indicate-signals-being-pulled-high-low-br-br-With-the-test-leads-supp