Diagnose Faulty Relays And Battery Voltage Instantly Without A Multimeter Using The LamiWexi Integrated Digital Relay Tester Supporting both 4-pin and 5-pin relays, a red LED voltage display, 10-cycle action release testing, and silicone alligator clips — the LamiWexi RT01 delivers fast relay and battery diagnostics straight from your car battery, no scanner needed. Struggling To Tell Whether A Relay Is Faulty Without Expensive Equipment? Press the TEST button and the RT01 automatically cycles the relay 10 times, lighting up green if it passes or red if it fails — a definitive verdict in seconds, no guesswork required. Tired Of Testers That Only Work On One Pin Configuration? The dual-socket design covers both 4-pin and 5-pin relays on the same unit. Simply insert the relay, switch the selector to 4PIN or 5PIN, and test — one tool handles every standard automotive relay type. Need Battery Voltage And Relay Results At The Same Time? Connect the alligator clips to your battery and the RT01 instantly displays live voltage on the LED screen — 11V to 25V, covering both 12V and 24V systems — while simultaneously running the relay test. 4-Pin And 5-Pin Relay Sockets With Selector Switch For Universal Compatibility Red LED Digital Display Shows Live Battery Voltage From 11V To 25V 10-Cycle Action Release Test With Green Pass / Red Fail Indicator Lights Silicone Insulated Alligator Clips With 2.1cm Opening And Strong Non-Slip Grip WHY CHOOSE LAMIWEXI INSTANT PASS/FAIL DIAGNOSIS Insert the relay, connect to the battery, and press TEST. The RT01 cycles the relay 10 times and lights up green for pass or red for fail — no interpretation needed. UNIVERSAL 4-PIN AND 5-PIN SUPPORT Two dedicated sockets and a simple gear selector cover every standard 4-pin and 5-pin automotive relay, so one tool replaces multiple testers. LIVE BATTERY VOLTAGE DISPLAY The red LED screen shows battery voltage the instant the clips connect — 11V to 25V — confirming battery condition alongside your relay test without switching tools. STABLE MAIN CONTROL CHIP A precision control chip ensures consistent, accurate readings across every test cycle, eliminating the false results common in basic relay testers. HEAVY-DUTY SILICONE CLIPS Silicone insulated handles, a wear-resistant clamp body, and a 2.1cm jaw grip battery terminals firmly without slipping throughout the full test sequence. ONE-PIECE INTEGRATED BUILD All sockets, display, indicator lights, and leads are built into a single compact unit — no loose parts, stable readings, always ready to use. NO BATTERY REQUIRED The RT01 powers directly from the vehicle battery through the alligator clips — no internal batteries to charge or replace, ever. MEET THE LAMIWEXI RT01 Frequently Asked Questions How do I test a relay with the RT01? Clip to the battery, insert the relay into the correct socket, set the selector to 4PIN or 5PIN, and press TEST. Green means good; red means faulty. What relay types does it support? Both 4-pin and 5-pin automotive relays found in standard cars, vans, and light trucks on 12V or 24V systems. What voltage range does battery detection cover? 11V to 25V, covering both 12V passenger vehicles and 24V trucks and commercial vehicles. Does it need its own batteries? No — it runs entirely off the vehicle battery through the included alligator clips. What does the 10-cycle test measure? Action release timing and response consistency across 10 open/close cycles. Slow or inconsistent results trigger the red fail light. Why silicone clips over standard ones? The insulated handles prevent short circuits, and the strong jaw maintains a firm, slip-free connection throughout the full test cycle. Is it safe to use on a running vehicle? Yes — connect red to positive and black to negative, keep the unit away from moving parts, and handle with dry hands.
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