The RT01 Automotive Relay Tester is a practical diagnostic tool designed to quickly identify faulty relays in vehicle electrical systems. Simply connect the tester to a vehicle battery and insert the relay for testing.
12V Automotive Relay Tester 4 Pin 5 Pin Relay Test Tool Car Relay Diagnostic
12V Automotive Relay Tester Kit - Car Battery & Alternator Tester, 4/5 Pin Relay
12V Automotive Relay Tester – Universal Electronic Relay Diagnostic Tool