Universal 12V Car Relay Tester – Checks 4-Pin and 5-Pin Relays with LED Indicators

Built for People Who Actually Care About Their Cars

Test a Relay in Seconds

A relay tester that shows whether a common automotive relay is working. Connect it to the car battery, plug in the relay, press TEST and read the LED result.

Key Features

• Tests 4-pin and 5-pin automotive relays
• Checks pin configuration and contact closing and opening timing
• Cycles the relay 10 times to verify the switching sequence
• Red LED signals a faulty relay, green LED a pass
• Powered from the car battery with crocodile clips

Compatibility

• 12V automotive relays with 4 or 5 pins

Product Details

• Voltage: 12 V
• Relay sockets: 3 (4-pin and 5-pin)
• Connection: Crocodile clips to the car battery

What's Included

• 1 × relay tester with power leads

Installation

1. Black clip to negative, red clip to positive – the tester is on when the LED lights red.
2. Plug the relay into a matching socket and press TEST.

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