Relay Tester 12V Universal Automotive Diagnostic Tool

A 12V relay tester for checking common automotive relays on modern vehicles without relying on trial and error. It is a universal automotive diagnostic tool that uses power from the vehicle battery and gives a clear visual result through red and green LED indicators.

Used for vehicle maintenance, fault finding and servicing work, this tester helps when tracking down relay-related electrical problems in cars. Useful in garages, workshops and home repair situations, it can save time when a suspected relay is causing issues with starting, lighting, cooling fans or other switched circuits. For anyone carrying out regular automotive diagnostics, it gives a quick way to check whether a relay is operating normally before replacing parts unnecessarily.

Built to test three of the most popular relay types found on most modern cars, it covers a common range of day-to-day diagnostic jobs. The red light shows an abnormal test result, while the green light shows normal operation, so results are straightforward to read during checks. Because it runs from a 12V vehicle battery, there is no separate power source to organise when working around the car. That makes it useful for repeated workshop use and helps keep electrical testing simple when common relay faults need confirming.

Relay tester specifications

• Voltage: Uses 12V power from the vehicle battery.
• Function: Tests automotive relays to help identify faulty or working units.
• Covers: Suitable for three of the most popular relay types used on modern cars.
• Indicators: Red light shows abnormal results and green light shows normal results.
• Application: Handy for garage diagnostics, servicing, vehicle maintenance and home automotive repairs.

A practical choice for regular vehicle electrical checks and relay fault finding.