This professional 12V automotive relay tester
quickly diagnoses 4-pin and 5-pin vehiclerelays,
helping mechanics verify relay conductivity,
switching performance and
internalresistance without complex wiring.
Powered directly by a vehicle 12V battery,
it featuressimple one-button test operation
with dual-color LED status prompts for
intuitive faultjudgment, ideal for auto repair shops,
roadside maintenance and DIY vehicletroubleshooting.
