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- 4 Pin Trailer Tester Connector, with LED Indi...
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Item #:
221665155
4 Pin Trailer Tester Connector, with LED Indicators (1PC)
89% of respondents would recommend this to a friend
Item #:
221665155
SCR 177
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
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In stock
Imported from USA store
QTY:
Order now and get it around Sunday, September 20
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Ensure the normal operation of your trailer lighting system and eliminate driving safety hazards with our high-quality trailer light tester.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
LED Indicators
Equipped with bright LED indicators, this tool provides clear visual feedback, enabling users to easily identify issues with brake, turn, and tail lights, ensuring safe vehicle operation.
Universal Compatibility
Designed to be universally compatible with most 4-pin trailer connections, making it a versatile tool for various vehicles, saving time and effort in troubleshooting light problems.
Compact Design
Its compact and lightweight design ensures portability and ease of storage, allowing users to carry it conveniently for quick access during roadside emergencies or maintenance.
Product Details
| Minimum Operating Voltage | 6 volts_of_direct_current |
| Compatible Devices | Trucks, Boats, RVs, Campers with 4-pin trailer plug and 6-24V DC voltage |
| Style Name | Compact |
| Color | Black |
| Item Weight | 10 g |
| Item Dimensions | 1.97 x 1.38 x 0.39 inches (5 x 3.5 x 1 cm) |
| Brand Name | GAOLAOSY |
| Model | Trailer Tester Connector |
| Unit Count | 1 Count |
| Number of Items | 1 |
| Manufacturer | GAOLAOSY |
| Number of Packs | 1 |
| Included Components | Trailer Tester Connector |
| Part Number | GAOLAOSY-GLA-139 |
| Brand | GAOLAOSY |
| Style | Compact |
| Item dimensions L x W x H | 1.97 x 1.38 x 0.39 inches (5 x 3.5 x 1 cm) |
Who Should Buy?
-
DIY Enthusiasts
Perfect for those who enjoy fixing their own trailers and want to quickly troubleshoot lighting issues.
-
Professional Mechanics
An essential tool for mechanics diagnosing trailer light problems efficiently and effectively.
-
Frequent Travelers
Ideal for road trip lovers who need to ensure their trailer lights are functioning correctly before embarking.
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Heavy-Duty Use
Not suitable for commercial or heavy-duty applications where advanced testing equipment is necessary.
Product Description
4 Pin Trailer Tester Connector, with LED Indicators (1PC)
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What type of vehicles can I use this trailer light tester with?
Answer: It is compatible with 6-24V DC voltage vehicles, including trucks, boats, RVs, and campers. -
Question:
Is it easy to use for beginners?
Answer: Yes, it features a plug-and-play operation that allows anyone to use it without professional skills. -
Question:
How portable is the trailer light tester?
Answer: It has a compact design and an equipped hanging ring for easy access and storage.
GAOLAOSY Wiring Editorial Review
The product has garnered a positive reception among users who appreciate its functionality and effectiveness in troubleshooting trailer wiring issues. Customers frequently mention the convenience of using this tool to verify correct wiring without the need for guesswork or unnecessary checks. Many reviewers highlight its ability to quickly identify wiring problems, which can save time and frustration when dealing with trailer connectivity. Overall, users see this product as a reliable solution for ensuring that their trailer wiring is functioning correctly, making it a valuable addition to any trailer owner's toolkit. **
Customer Reviews & Ratings
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Pros
- Effectively verifies correct trailer wiring
- Eliminates guesswork in troubleshooting
- Saves time and reduces frustration
Cons
- No significant Cons mentioned in the reviews.
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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SCR 177
Order now and get it around Sunday, September 20
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
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Features & Benefits
- Constructed with high-toughness ABS housing and premium copper contacts for durability.
- Accurately detects circuit status for turn signals, directional lights, and brake lights.
- Compact size for easy storage and portability, perfect for glove boxes or tool bags.
- Plug-and-play operation makes it user-friendly for anyone, regardless of expertise.
- Compatible with various towed vehicles, suitable for a wide range of applications.
- Enhances safety by identifying wiring faults quickly and efficiently.
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