--- title: "7 pin trailer plug tester — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/7-pin-trailer-plug-tester" last_updated: "2026-07-10T02:08:45.404Z" locale: en meta: description: "a small market ($226K/yr) — 7 pin trailer plug tester doesn't clear our bar today." "og:description": "a small market ($226K/yr) — 7 pin trailer plug tester doesn't clear our bar today." "og:title": "7 pin trailer plug tester — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen" --- Back to Flapen home # **7 pin trailer plug tester** **Skip it****44/100 ** a small market ($226K/yr) — 7 pin trailer plug tester doesn't clear our bar today. **Market/yr** **$226K** **Growth (1y)** **+193.3%** **Products** **14** **Brands** **12** was 19 a year ago **Sellers** **20** **Price range** **$7.23–$33.86** **Returns** **2.1%** **Rating** **4.6★** **Skip it** Scored 44/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **11** ×0.30 Growth **76** ×0.30 Competition **30** ×0.20 Quality gap **33** ×0.10 Returns **83** ×0.10 ## **Demand** Weekly Amazon search volume, last 104 weeks — +193.3% year over year. 3K2KSpike '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND Peak months: May · busiest ÷ quietest = 1.8× ## **Competition** - WUSHIXAN31% - Oyviny22% - CURT12% - CXTM6% - Kefly6% - Innovative Products of America5% - Other (6 brands)17% The top 5 products take 70% of clicks — established leaders, but buyers still shop beyond them. 12 brands and 20 sellers compete here. **Brands** **12 **▼falling was 19 a year ago **Sellers** **20** **Top 5 brand share** **77%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![WUSHIXAN Trailer Light Tester 7 Pin Trailer Plug Testerwith Red LED 7 Way Trailer Plug Testerfor Diagnosing and Fixing Trailer Socket Circuit Problems](https://m.media-amazon.com/images/I/41lpBTWaaBL.jpg) [**WUSHIXAN Trailer Light Tester 7 Pin Trailer Plug Testerwith Red LED 7 Way Trailer Plug Testerfor Diagnosing and Fixing Trailer Socket Circuit Problems**](https://www.amazon.com/dp/B0CGQX1P3N) WUSHIXAN$8.004.4★58031%▲rising 2 ![Oyviny 7 Pin Trailer Plug Tester & 4 Pin Trailer Tester with Double-Sided LED Indicators Trailer Light Tester for Boat Trailer RV Truck Camper Not Suitable for Vehicle with Lamp Out Sensor](https://m.media-amazon.com/images/I/41S+8yAGSYL.jpg) [**Oyviny 7 Pin Trailer Plug Tester & 4 Pin Trailer Tester with Double-Sided LED Indicators Trailer Light Tester for Boat Trailer RV Truck Camper Not Suitable for Vehicle with Lamp Out Sensor**](https://www.amazon.com/dp/B0DBL45YFN) Oyviny$20.294.6★29614%▲rising 3 ![CURT 58272 7-Pin RV Blade Trailer Wiring Towing Vehicle Socket Tester Orange](https://m.media-amazon.com/images/I/311Uq5ZfP6L.jpg) [**CURT 58272 7-Pin RV Blade Trailer Wiring Towing Vehicle Socket Tester Orange**](https://www.amazon.com/dp/B0BVZYBRGM) CURT$19.774.7★20812%▲rising 4 ![Oyviny 7 Way Blade & 4 Pin Trailer Light Circuit Tester with LED Indicators 6 Function Light Tester for RV Truck Vehicle Side Trailer Socket Tester](https://m.media-amazon.com/images/I/41jdBloX8+L.jpg) [**Oyviny 7 Way Blade & 4 Pin Trailer Light Circuit Tester with LED Indicators 6 Function Light Tester for RV Truck Vehicle Side Trailer Socket Tester**](https://www.amazon.com/dp/B09C85C92J) Oyviny$18.294.5★1,2676%▲rising 5 ![CXTM Trailer Light Tester 7 Pin Trailer Plug Tester 7 Way Wiring Tester with LED Lights RV Connector Socket Circuit Tester](https://m.media-amazon.com/images/I/41iy5UtNhdL.jpg) [**CXTM Trailer Light Tester 7 Pin Trailer Plug Tester 7 Way Wiring Tester with LED Lights RV Connector Socket Circuit Tester**](https://www.amazon.com/dp/B091GLV8H8) CXTM$7.984.5★6436%▲rising 6 ![Kefly 7-Way Round Pin Trailer Truck Circuit Plug Tester Replace 7865L Trailer Tractor Light Tester](https://m.media-amazon.com/images/I/31y1J+LjbML.jpg) [**Kefly 7-Way Round Pin Trailer Truck Circuit Plug Tester Replace 7865L Trailer Tractor Light Tester**](https://www.amazon.com/dp/B0CY4Q9NJB) Kefly$22.704.7★2346%▼falling 7 ![Innovative Products of America (7865L) 7-Way Round Pin Tractor Trailer Circuit Chaser for Testing Turn Signals Hazard Lights Brake Lights and More](https://m.media-amazon.com/images/I/41L35uMhSnL.jpg) [**Innovative Products of America (7865L) 7-Way Round Pin Tractor Trailer Circuit Chaser for Testing Turn Signals Hazard Lights Brake Lights and More**](https://www.amazon.com/dp/B000HI48KI) Innovative Products of America$33.864.8★2,0345%▼falling 8 ![NeaLia 7 Pin Trailer Plug Tester 7 Way Wiring Tester for RV Round Trailer Light Tester for Truck Pickup Towing Tow Wire Brake Blade 12V Connector](https://m.media-amazon.com/images/I/31kS1GdwnLL.jpg) [**NeaLia 7 Pin Trailer Plug Tester 7 Way Wiring Tester for RV Round Trailer Light Tester for Truck Pickup Towing Tow Wire Brake Blade 12V Connector**](https://www.amazon.com/dp/B0DJVXV8FT) NeaLia$7.234.4★2954%—flat 9 ![PKDOAX 7 Way Trailer Plug Tester 7 Pin Trailer Light Tester with LED Lights 7 Way Wiring Tester for Truck Pickup Towing RVs - Plug & Play](https://m.media-amazon.com/images/I/41unzAZB9uL.jpg) [**PKDOAX 7 Way Trailer Plug Tester 7 Pin Trailer Light Tester with LED Lights 7 Way Wiring Tester for Truck Pickup Towing RVs - Plug & Play**](https://www.amazon.com/dp/B0DR8KYPNQ) PKDOAX$7.714.4★1024%▲rising 10 ![TOVOP auto #7865L 7-Way Round Pin Tractor Plug Tester Trailer Circuit black](https://m.media-amazon.com/images/I/318+WVtYSLL.jpg) [**TOVOP auto #7865L 7-Way Round Pin Tractor Plug Tester Trailer Circuit black**](https://www.amazon.com/dp/B0D2NQM6NZ) TOPVOP auto$22.844.7★983%▼falling 11 ![OPT7 7 Pin & 4 Pin Circuit Tester Adapter w/ 6 LED Indicators 7 Way Blade to 4 Way Flat Trailer Connector w/Secure Tab for Pickup Truck Trailer Tow Hitch 5.3 Long x 2.36 Diameter](https://m.media-amazon.com/images/I/41JGfnbPW8L.jpg) [**OPT7 7 Pin & 4 Pin Circuit Tester Adapter w/ 6 LED Indicators 7 Way Blade to 4 Way Flat Trailer Connector w/Secure Tab for Pickup Truck Trailer Tow Hitch 5.3 Long x 2.36 Diameter**](https://www.amazon.com/dp/B0DMVS78B3) OPT7$17.334.4★1103%▼falling 12 ![NEW SUN Quick Connect 7-Pin Trailer Light Tester 7-Way Trailer Plug Tester with LED Lights Indicator Round Plug Blade Connector Assemble Circuit Checking for Trailer Truck RVs - Plug & Play](https://m.media-amazon.com/images/I/41jog4TkNHL.jpg) [**NEW SUN Quick Connect 7-Pin Trailer Light Tester 7-Way Trailer Plug Tester with LED Lights Indicator Round Plug Blade Connector Assemble Circuit Checking for Trailer Truck RVs - Plug & Play**](https://www.amazon.com/dp/B07GKXT613) NEW SUN$9.234.4★7152%▼falling 13 ![Oyviny 3-in-1 Trailer Plug Tester 4/5 Pin Flat & 7 Pin Trailer Light Tester with Double-Sided LED Indicators 5 Way & 7 Way RV Trailer Connector Tester Not Suitable for Vehicle with Lamp Out Sensor](https://m.media-amazon.com/images/I/412FozKUKpL.jpg) [**Oyviny 3-in-1 Trailer Plug Tester 4/5 Pin Flat & 7 Pin Trailer Light Tester with Double-Sided LED Indicators 5 Way & 7 Way RV Trailer Connector Tester Not Suitable for Vehicle with Lamp Out Sensor**](https://www.amazon.com/dp/B0D1B9BBR7) Oyviny$22.274.7★2462%▼falling 14 ![7-Way Round Pin Tractor Trailer Light Tester One-Man Testing Replace# 7865L](https://m.media-amazon.com/images/I/31S61fJV4gL.jpg) [**7-Way Round Pin Tractor Trailer Light Tester One-Man Testing Replace# 7865L**](https://www.amazon.com/dp/B0CZ6QP25W) Misakomo$23.154.8★1222%—flat ## **Product shelf** All 14 tracked products in this niche. Top sellersNewestTrending [![WUSHIXAN Trailer Light Tester 7 Pin Trailer Plug Testerwith Red LED 7 Way Trailer Plug Testerfor Diagnosing and Fixing Trailer Socket Circuit Problems](https://m.media-amazon.com/images/I/41lpBTWaaBL.jpg)**WUSHIXAN Trailer Light Tester 7 Pin Trailer Plug Testerwith Red LED 7 Way Trailer Plug Testerfor Diagnosing and Fixing Trailer Socket Circuit Problems** WUSHIXAN**$8.00**4.4★580 reviews](https://www.amazon.com/dp/B0CGQX1P3N) [![Oyviny 7 Pin Trailer Plug Tester & 4 Pin Trailer Tester with Double-Sided LED Indicators Trailer Light Tester for Boat Trailer RV Truck Camper Not Suitable for Vehicle with Lamp Out Sensor](https://m.media-amazon.com/images/I/41S+8yAGSYL.jpg)**Oyviny 7 Pin Trailer Plug Tester & 4 Pin Trailer Tester with Double-Sided LED Indicators Trailer Light Tester for Boat Trailer RV Truck Camper Not Suitable for Vehicle with Lamp Out Sensor** Oyviny**$20.29**4.6★296 reviews](https://www.amazon.com/dp/B0DBL45YFN) [![CURT 58272 7-Pin RV Blade Trailer Wiring Towing Vehicle Socket Tester Orange](https://m.media-amazon.com/images/I/311Uq5ZfP6L.jpg)**CURT 58272 7-Pin RV Blade Trailer Wiring Towing Vehicle Socket Tester Orange** CURT**$19.77**4.7★208 reviews](https://www.amazon.com/dp/B0BVZYBRGM) [![Oyviny 7 Way Blade & 4 Pin Trailer Light Circuit Tester with LED Indicators 6 Function Light Tester for RV Truck Vehicle Side Trailer Socket Tester](https://m.media-amazon.com/images/I/41jdBloX8+L.jpg)**Oyviny 7 Way Blade & 4 Pin Trailer Light Circuit Tester with LED Indicators 6 Function Light Tester for RV Truck Vehicle Side Trailer Socket Tester** Oyviny**$18.29**4.5★1,267 reviews](https://www.amazon.com/dp/B09C85C92J) [![CXTM Trailer Light Tester 7 Pin Trailer Plug Tester 7 Way Wiring Tester with LED Lights RV Connector Socket Circuit Tester](https://m.media-amazon.com/images/I/41iy5UtNhdL.jpg)**CXTM Trailer Light Tester 7 Pin Trailer Plug Tester 7 Way Wiring Tester with LED Lights RV Connector Socket Circuit Tester** CXTM**$7.98**4.5★643 reviews](https://www.amazon.com/dp/B091GLV8H8) [![Kefly 7-Way Round Pin Trailer Truck Circuit Plug Tester Replace 7865L Trailer Tractor Light Tester](https://m.media-amazon.com/images/I/31y1J+LjbML.jpg)**Kefly 7-Way Round Pin Trailer Truck Circuit Plug Tester Replace 7865L Trailer Tractor Light Tester** Kefly**$22.70**4.7★234 reviews](https://www.amazon.com/dp/B0CY4Q9NJB) [![Innovative Products of America (7865L) 7-Way Round Pin Tractor Trailer Circuit Chaser for Testing Turn Signals Hazard Lights Brake Lights and More](https://m.media-amazon.com/images/I/41L35uMhSnL.jpg)**Innovative Products of America (7865L) 7-Way Round Pin Tractor Trailer Circuit Chaser for Testing Turn Signals Hazard Lights Brake Lights and More** Innovative Products of America**$33.86**4.8★2,034 reviews](https://www.amazon.com/dp/B000HI48KI) [![NeaLia 7 Pin Trailer Plug Tester 7 Way Wiring Tester for RV Round Trailer Light Tester for Truck Pickup Towing Tow Wire Brake Blade 12V Connector](https://m.media-amazon.com/images/I/31kS1GdwnLL.jpg)**NeaLia 7 Pin Trailer Plug Tester 7 Way Wiring Tester for RV Round Trailer Light Tester for Truck Pickup Towing Tow Wire Brake Blade 12V Connector** NeaLia**$7.23**4.4★295 reviews](https://www.amazon.com/dp/B0DJVXV8FT) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Advertised Vs Actual Product**20% *“Works as advertised”* **Quality-Overall**18% *“Top notch and worked well”* **Efficiency**17% *“worked as should”* **Ease Of Use**12% *“Easy to use”* **Value For Money**11% *“Worth it”* **Socket/Port/Plug**4% *“Great tool for testing the wiring on 7 pin connectors”* **Design-Overall**3% *“Works well as designed”* **Connectivity-Overall**3% *“Quick connect 7”* **Compactness**1% *“has a nice compact size for storage”* **Functionality-Overall**1% *“7 prong tester worked fine”* ### **What buyers complain about ** **Functionality-Overall**28% *“did not function correctly”* **Quality-Overall**15% *“Low quality”* **Size-Overall**12% *“doesn't fit right”* **Instructions/User Manual/Troubleshooting**7% *“Did not come with directions”* **Design-Overall**5% *“However, the engineering of this thing is just bad”* **Connectivity-Overall**4% *“Was having some connection issues on my 7 pin connector”* **Compatibility-Overall**3% *“Did not work on 2015 Chevrolet Silverado”* **Assembly/Installation**3% *“Saced me a lot of troubleshooting time”* **Touch/Button Controls**3% *“nothing changes when I press the pedals or buttons in my car”* **Advertised Vs Actual Product**3% *“Did not work as advertised”* #### **Top return reasons**- Functionality-Overall27% - Compatibility-Overall22% - Size-Overall16% - Defective Material/Parts7% - Connectivity-Overall6% - Advertised Vs Actual Product6% - Socket/Port/Plug5% - Brightness/Shine/Glow2% - Quality-Overall2% - Value For Money1%