Precision Automotive Circuit Testing
Powered by 12V DC, the MRCARTOOL B550 delivers rapid voltage checks and continuity testing with LED indicators for clear diagnostics. Its hardened ABS casing and gold-plated probes ensure durability against wear and corrosion.
Effortless Fault Detection
Integrated alligator clip and piercing probe tackle loose wires, blown fuses, or parasitic drains—ideal for mechanics and DIYers troubleshooting cars, trucks, or marine electronics.
Smart Safety Design
Built-in overload protection prevents damage to vehicle ECUs. The ergonomic grip and compact size allow one-handed operation in tight engine bays or under dashboards.
Multi-System Compatibility
Works seamlessly on 12V/24V systems—test headlights, alternators, relays, or audio wiring without extra tools. Backed by our global wholesale pricing for bulk orders.