Troubleshooting LED Trailer Lights Not Working w/ a 2024 Mazda CX-5

Updated 11/03/2025 | Published 01/01/2025

Products Featured in This Question

Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"

(495)

$190.89

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(78)

$86.64

Question:

I have a trailer that I just converted to Led lights I have a Honda Element with a Curt hitch and harness that works perfectly well with the LED lights. I also have a 2024 Cx5 mazda with a factory hitch installed and it wont work with new Led lights in my trailer . I was told that the curt controller and wiring kit will compensate for the low current draw in the LED lights on my trailer . is this correct? the new lights work perfect on the curt setup on both my other rigs. as you can see from the photos . complete new wiring on trailer .

asked by: PATRICK B

LED Lights
(click to enlarge)

Expert Reply:

Hey Patrick, thanks for the pictures! I recommend checking to see if Mazda included the towing fuses on your 2024 CX-5. The foreign manufacturer's have been shipping out newer vehicles without these fuses to save on overall costs. You'll want to look under your fuse box at the key and see if all the towing fuse locations are full. The Curt Wiring Harness item # C45FV shouldn't have any issues work with LED's assuming it's being supplied power.

If that isn't the problem you'll want to check and see if your 4-way is working correctly. You can use a circuit tester like item # I26 to check and see if it is functional. You may have a fault in your wiring which you'll want to work backwards from the 4-way to see if you can find it and repair it.

expert reply by: Jerred H

Jerred H.

11/3/2025

Hey Patrick, did you find out if the missing towing fuses were the reason your CX-5 wasn’t powering the LED trailer lights? Knowing what fixed it could really help others running into the same issue with factory wiring.