Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
This circuit tester plugs into the 7-way connector on your vehicle. LED lights indicate which functions (brake, turn, tail, stop, reverse, electric brakes, and 12V) are properly working. Color-coded LEDs make it easy to distinguish each signal.
Features:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi there. I'm Michael with etrailer.com. Today we're gonna take a quick look at this Curt 7-Way to RV Socket LED Circuit Tester. Now this 7-way connector tester is going to plug into your vehicle's wiring harness to confirm your lights are functioning properly. You can see we do have a color-coded and labeled set of LEDs here that are going to make it very easy to distinguish your vehicle's signals. So, if we work from the bottom here, you can see we've got our TM for our tail lights.
We've got our LT for our left turn signal and our RT for our right turn signal. Those will both light up for our brakes, so we can check our brakes. We've got the BU for our backup, BK for our electric brakes, and then our 12V for our auxiliary power. So this will be very easy to operate. Just plug it right in, apply your turn signals, brakes, electric brakes, that sort of thing.
It will light up to indicate that it's functioning properly. We can loosen this screw on the backside that will allow us to twist that LED head so that we can get that lined up in whatever orientation is gonna be easiest for us to view as we are testing those out. So we'll just take a little bit of backing out of that screw there, and then we can twist the head to whichever orientation is gonna be easiest for us to see, and then tighten it back down so it always be able to make sure that we have a very easy time just to plug this in and then operate those signals, make sure that they're working properly. So that completes our look for today. Again, I'm Michael with etrailer.com.
Thanks for watching.
Customer Satisfaction Score:
100% were satisfied with this product
0% of customers were not satisfied
Ratings & Reviews
Works great on my 2020 GMC D
email 2500. This has some active electronics that enable it to connect to the advanced towing package on my truck. Tried a cheaper version that looked the same but couldn’t connect.
Great products
Order arrived promptly and worked as ad vertised
Great product and fast shipping
Works as it should, very helpful diagnostic tool. as always etrailer delivered quickly and without issues.
It works fine. Told me I have bad trailer lights.
Works very well
Exactly what I wanted! The high Vis orange is super easy to see and the LEDs are bright.
Works as expected! Like the easy to see orange that won't get lost.
Good shipping response.
nice to have a test tool for pre-trip check and troubleshoot
Simple to use. Straight forward directi ons.
Service was exemplary from etrailers.com. Would order from them again. Plug in probably works. Haven't tried it yet. But the service...
Works as described.
I bought a Stealth Hitch with a towing kit for my BMW X3 and this helped confirm that I had everything wired up correctly. The peace of mind was worth it!
very helpful in troubleshooting the receptacles on my pickup and trailers
I had an electrical issue with my 5th wheel connector and needed to troubleshoot it. I immediately thought of etrailer and had the tool delivered to my campsite. Problem solved.
Seems to be a good product and worked on my 2024 GMC 2500 Denali. Ordering was easy and shipping relatively quickly. Thank you etrailer.
Works perfectly! I purchased this to trick my 2025 GMC sierra HD into putting the video monitors “on” when using turn signals when no trailer is actually connected. Plugged this into the 5th wheel port in the bed and it works great. Obviously need a trim package that has the cameras though.
Very useful tool for troubleshooting you truck and trailer wires.
Thanks
Tested my 7 pin connector on my motorhome perfectly. Was able to diagnose why my tow vehicle lights were not functioning.
Fabulous product. I was able to use it to determine my problem was with my truck. I replaced the circuit breaker in the truck that controlled this prong and for about $6 fixed the problem. Would have cost lots more to take the truck to the Ford dealership. Best purchase ever.
Plugged in tail light starred up lights worked just liked they suppose to except for the brake light couldn't run to back of pickup fast enough to see if lit up ( ha ha )
Works well, just as advertised. Instructions provide more detail about what each LED is testing.
Makes it easy to check for bad wiring or blown fuses on your vehicle. Like the ability to rotate the lights to make it easier to see them.
Showed that the 12v pin was flaky and cleaning/dielectric grease fixed it.
Condition: Like New
Notes: May have damaged packaging or minor cosmetic blemishes.
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.
Earnest
5/2/2026
Still does a good job testing light plug on vehicles and saves time.