Whether you have just installed a new vehicle-to-trailer wiring harness or are trying to locate the cause of an electrical problem, this tester is great for testing taillights, brake controller output , back up or reverse circuit center pole, right turn/brake, left turn/brake and 12-volt power.
This tester helps troubleshoot and get your trailer connectors all right before picking up your trailer.
Trailer Plug Tester Comparision from Oyviny
 4 & 7 Pin Double Side |  4 & 5 & 7 Pin Double Side |  7 Pin to 12V Plug Adapter |  7 Pin Plug Tester |  Double End 4 Pin Tester |  4 Pin Tester |  Double End 5 Pin Tester | |
|---|---|---|---|---|---|---|---|
Customer Reviews | — | — | — | — | — | — | — |
Price | — | — | — | — | — | — | — |
Light Tester | ? | ? | ? | ? | ? | ? | ? |
Plug and Play | ? | ? | ? | ? | ? | ? | ? |
Pin of Tester | 4 Pin & 7 Pin | 4 Pin & 5 Pin & 7 Pin | 5 Pin & 7 Pin & 12 V | 7 Pin | Dual 4 Pin | 4 Pin | 5 Pin |
Test Function | 6 Functions | 6 Functions | 6 Functions | 6 Functions | 3 Functions | 3 Functions | 4 Functions |
Product Design | 2 in 1 Design Trailer Tester | 3 in 1 Design Trailer Tester | 7 Pin to 12V Plug with Tester | 7 Way Light Tester | 4 Pin Male and Female Tester | 4 Way Flat Circuit Tester | 5 Pin Male and Female Tester |
Why does the tester upside down on some vehicles?
As manufacturer changed 7 way plug position for 2017 Newer Ford/GMC/Chevy model, so it will upside down when pluging into the socket on these models.
Will this tester works if my truck with LED lighting system?
No, this 7 pin trailer plug tester is unable to test LED lighting system, the tester can't recognize the low current of LED lights.
Will this tester works with all the vehicle models?
Tester doesn't work with vehicle has a lamp-out sensor, such as BMW, VW, Audi, Mercedes-Benz, Porsche etc. Please make sure the slot of your 7 pin trailer plug is in the top position.
Whether you have just installed a new vehicle-to-trailer wiring harness or are trying to locate the cause of an electrical problem, this tester is great for testing taillights, brake controller output , back up or reverse circuit center pole, right turn/brake, left turn/brake and 12-volt power.
This tester helps troubleshoot and get your trailer connectors all right before picking up your trailer.
Trailer Plug Tester Comparision from Oyviny
4 & 7 Pin Double Side | 4 & 5 & 7 Pin Double Side | 7 Pin to 12V Plug Adapter | 7 Pin Plug Tester | Double End 4 Pin Tester | 4 Pin Tester | Double End 5 Pin Tester |
|---|---|---|---|---|---|---|
| Customer Reviews | ||||||
| — | — | — | — | — | — | — |
| Price | ||||||
| — | — | — | — | — | — | — |
| Light Tester | ||||||
| ? | ? | ? | ? | ? | ? | ? |
| Plug and Play | ||||||
| ? | ? | ? | ? | ? | ? | ? |
| Pin of Tester | ||||||
| 4 Pin & 7 Pin | 4 Pin & 5 Pin & 7 Pin | 5 Pin & 7 Pin & 12 V | 7 Pin | Dual 4 Pin | 4 Pin | 5 Pin |
| Test Function | ||||||
| 6 Functions | 6 Functions | 6 Functions | 6 Functions | 3 Functions | 3 Functions | 4 Functions |
| Product Design | ||||||
| 2 in 1 Design Trailer Tester | 3 in 1 Design Trailer Tester | 7 Pin to 12V Plug with Tester | 7 Way Light Tester | 4 Pin Male and Female Tester | 4 Way Flat Circuit Tester | 5 Pin Male and Female Tester |
Why does the tester upside down on some vehicles?
As manufacturer changed 7 way plug position for 2017 Newer Ford/GMC/Chevy model, so it will upside down when pluging into the socket on these models.
Will this tester works if my truck with LED lighting system?
No, this 7 pin trailer plug tester is unable to test LED lighting system, the tester can't recognize the low current of LED lights.
Will this tester works with all the vehicle models?
Tester doesn't work with vehicle has a lamp-out sensor, such as BMW, VW, Audi, Mercedes-Benz, Porsche etc. Please make sure the slot of your 7 pin trailer plug is in the top position.
4 Pin Trailer Wiring Adapter
7 Pin Trailer Plug
Trailer Plug Adapter
5 Pin Trailer Wiring Adapter
7 Pin Trailer Wiring Harness
USCAR Trailer Wiring Adapter
Trailer Circuit Tester
Other Trailer Accessories
Truck Trailer Tail Lights
Electrical Tape
Brake Controller Wiring
