LED Indicator Light Car Battery Checker Automotive Electronic Relay Tester Car R
LED Indicator Light Car Battery Checker Automotive Electronic Relay Tester Car Relay Test Automotive Accessories Universal 12V. 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.