Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
This circuit tester plugs into the four-way trailer connector on the vehicle. The bright LED lights analyze the trailer connections and indicate which functions (tail, left turn and stop, right turn and stop) are working properly and which are not.
I-26 Curt LED 4-Way Flat Connector Circuit Tester
Video of Curt LED 4-Way Flat Connector (Vehicle End) Tester
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today we are going to show you the Curt LED 4-way flat trailer connector tester, part number I26. The Curt LED tester fits your standard 4-pole flat connector on your vehicle. We will throw it on the vehicle and show you how it works. We will take our 4-way connector at the end of our vehicle and plug our tester in. Next, we will turn on our headlights to make sure our running light circuit is functioning. Our LEDs lit up, so it tells us our running light function is working properly and we have got the tail lights on, on our vehicle. Next we will check our brakes, you should see both of these lights light up when we hit our brake pedal. Okay, the brake signal is working well. Now we will check left blinker and our right blinker. And with that we know the lights on our vehicle are working, as well as our trailer connector. And that does it for the Curt LED 4-way connector tester, part number I26.
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Average Customer Rating: 
4.8 out of 5 stars (8 Customer Reviews)
by: George Clark (AU)12/28/2011
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Used during installation of the C5602 harness. Works a treat!28826
by: John10/29/2011
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It's just a tester, and it works. Fast shipping, packaged well.26316
by: Bill B.09/13/2011
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EXCELLENT...... START TO FINISH. Fantastic service, great prices, quality products. Very handy little tool. Thanks again, Bill B. in Michigan 23876
by: Kendal S08/10/2011
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This is a great inexpensive and easy to use tester. 21543
by: Ed S.05/29/2011
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Handy and works well. 15645
by: Larry05/24/2011
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everything worked perfect 15263
by: RS Tex05/05/2011
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Best little item to have laying around. I have a 6 pole harness and adapter and wasn't even sure if the 4 pole connector worked. Plugged this in and 30 seconds later, I had the results.12973
by: Bruce08/18/2009
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Simple to use This tester is well worth the few dollars that it costs. Allows you to easily test your wiring harness during installation without having a trailer available. Also allows you to verify that the vehicle wiring is in working order when troubleshooting trailer lighting issues.2268
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