AERMOTOR Automotive Relay Car Tester 12V 4-5 Pins Electronic Diagnostic Tool

Aermotor Relay Buddy is a quick go / no-go tester for the most common automotive relays. Check the relay before plugging into the tester. If it's a 4 pin relay,select"4 pin" on the tester.If it's a 5 pin relay, select"5 pin"on the tester.