 
  Automotive Relay Tester — One-Button Check for 12V 4/5-Pin Relays
$19.50 USD
Unit price perEstimated delivery between November 02 and November 04.
A simple, reliable way to verify automotive relays. Insert the relay, press the button, and read the LED result. Works with common 12V 4- and 5-pin relays used in most vehicles and cover over 95% of automotive relays. Compact, durable, and ready for quick diagnostics at the bench or in the bay.
Key features
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One-Button Operation: Press to test; instant pass/fail via LED indicator. 
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Broad Compatibility: Supports standard 12V ISO mini 4-pin and 5-pin relays found in most cars and light trucks. 
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Clear LED Feedback: Bright status LEDs for quick, unambiguous results. 
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Portable & Durable: Lightweight body with protected leads; easy to store and carry. 
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Shop-Ready: Built for frequent use; ideal for technicians and DIYers. 
What it does
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Confirms whether a relay clicks and switches properly under a 12V test. 
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Helps isolate no-start, lighting, HVAC, and accessory faults caused by bad relays. 
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Reduces parts swapping by proving a relay good or bad before replacement. 
How to use
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Remove the suspect relay from the vehicle. 
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Insert it into the tester’s matching socket. 
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Connect the tester to a 12V source if required by your model. 
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Press the test button and read the LED result (pass/fail). 
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Reinstall or replace the relay based on the result. 
Specifications
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System voltage: 12V automotive circuits 
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Relay types: ISO mini 4-pin (SPST) and 5-pin (SPDT) 
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Indication: LED pass/fail status 
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Color: Red housing 
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Use case: Bench or on-vehicle (relay removed for testing) 
What’s in the box
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Relay tester unit (red) 
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Quick start guide 
Compatibility notes
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Designed for 12V relays. Not for 24V heavy-duty systems unless specified by your model. 
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Tests functionality (coil actuation and contact switching). It does not replace full circuit load testing. 



 
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$19.50 USD
Unit price per

 
 
                    
                 
 
                    
                 
 
                    
                 
 
                    
                 
 
                    
                 
 
                    
                 
 
                    
                 
 
                    
                 
 
                    
                
