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Tekonsha Trailer Wiring Circuit Tester

Tekonsha Trailer Wiring Circuit Tester

Item # 8010
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8010 - Circuit Tester Tekonsha Testers
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This tester helps you to quickly identify problems in your trailer wiring. It tests the left turn, right turn, tail/marker, brake and backup circuits to indicate the level of current in each circuit. It also tests the voltage of the trailer battery. 1-833-496-1390 to order Tekonsha electrical tools part number 8010 or order online at Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for Tekonsha Trailer Wiring Circuit Tester. Electrical Tools reviews from real customers.
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  • Reviews (9)
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  • Why etrailer?

Tekonsha Electrical Tools - 8010

  • Testers
  • Circuit Tester
  • Tekonsha

This tester helps you to quickly identify problems in your trailer wiring. It tests the left turn, right turn, tail/marker, brake and backup circuits to indicate the level of current in each circuit. It also tests the voltage of the trailer battery.


  • Helps to quickly identify problems in your trailer wiring
  • Tests the left turn, right turn, tail/marker, brake and reverse light circuits on the trailer
    • Works with incandescent and LED lights
  • Indicates approximate amount of current in each circuit
  • Determines faults in each circuit, such as no load, overload, short, or low battery
  • Monitors the voltage of the external battery (trailer battery) connected to the trailer charge circuit
  • Includes charger for the internal battery of the trailer tester
  • Works with 7-way trailer connector
    • Adapters (sold separately) allow use with 4-pole, 5-pole and 6-pole connectors
  • 1-Year limited warranty

Tekonsha circuit tester error codes

This diagram illustrates the error codes that the trailer tester will display if it detects faults in the currents of your trailer wiring.

8010 Tekonsha Trailer Wiring Circuit Tester

Installation Details 8010 Installation instructions

California residents: click here

Customer Reviews

Tekonsha Trailer Wiring Circuit Tester - 8010

Average Customer Rating:  4.9 out of 5 stars   (8 Customer Reviews)

This tester helps you to quickly identify problems in your trailer wiring. It tests the left turn, right turn, tail/marker, brake and backup circuits to indicate the level of current in each circuit. It also tests the voltage of the trailer battery.


Very nice unite. good for a one man job to narrow down a trouble circuit with out hooking up to truck and blowing fuses..


I find this product very helpful in analysis and repair of trailer wiring harnesses. It allows me to test circuits without a tow vehicle present. It also allows me to test individual circuits. Which is very helpful.

Paul B - 11/01/2020


Love this machine. Took the guess work out of trouble shooting wiring issues in our customers vehicles trailer receptacles. Cut down on time therefore saving the customer money which in turn brought in return busines. I recommend this equipment to all shops that need to diag truck/trailer hookup problems.

Still performs exactly like I need it to.
Jon S - 02/27/2019


The tester is a wonderful asset to have, to test and see if your trailer lights are working. Or to help you find a problem in your trailer lights or electric brakes. Especially when you are working on the trailer by yourself. The folks at etrailer were a great help when I was purchasing the tester, they helped me with all the questions I had on the tester before I purchased it.
Thanks Chris


This product works as advertised. I have owned it for a year now with no problems and use it every day. Battery life is longer than I expected. Some great improvements would be to keep the park lights on constantly instead of blinking. Also the brake test should be on constantly instead of pulsing. There should also be another test button for just brake lights.
Otherwise this thing works awesome. The US price is good but with the exchange rate in Canada most techs will just build their own.


Excellent product! Use multiple times a day for work. ETrailer has been awesome to buy from. Great product selection & fantastic customer service.


This is a must have if you own various equipment trailers or any other trailers. This unit allows you to test a trailer quickly in the yard or in the shop and locate any wiring issue you may have. It's small and very portable.

An absolute must for any company.


Excellent product !! Great support after the sale


Compact, very easy to move around.


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