This new 12V car relay tester diagnostic tool is designed for checking 4 and 5 pin automotive relays. It can be a practical option for DIY car owners, mechanics, or anyone troubleshooting relay-related electrical issues in a vehicle. Free shipping is included, which may help if you want a ready-to-use tool delivered without added shipping cost. Because the listing does not provide brand, material, size, or additional specifications, check the listing for full details before buying. If you need a basic relay testing tool for automotive maintenance or fault finding, this item may suit buyers looking for a straightforward diagnostic accessory. 12V Car Relay Tester Diagnostic Tool for 4 & 5 Pin Automotive Relays. Condition: New, Made in China. Listed at 7.48 USD. 12V Automotive Relay Tester Diagnostic Tool – Quick Go/No-Go Testing. This car relay tester is designed to quickly check the condition and operation of standard 12V automotive relays. Fast go/no-go diagnostic result.