BowhunterAT4
New member
Guys, I apologize if this has been answered somewhere else but if it has I could not find it.
Anyway, I have a utility trailer that I added LED backup lights on. Worked great when plugged into my Tundra but I just plugged the trailer into my new 2025 HD2500 and all the lights (brake, left & right turn signals, and running lights) work fine except for the back up LEDs.
I'm also getting a check backup lights reminder/warning on the dash.
NOTE: On this trailer I'm using an adapter to go from round RV trailer receptacle down to flat connector.
Any ideas?
Thanks in advance for any help!
UPDATE 8/27/25: I hooked my other trailer up that uses the round 7 Pin connector and the backup lights work. So, I don't know at this point if it has something to do with using the Round 7 Pin to Flat 5 Pin adapter or if something is actually wrong with my trailer lights. I'm figuring the latter. Will update with results.
UPDATE: 9/2/25
Trailer back up light problem fixed!
So, I thought I had LED backup lights on the trailer, turns out I had LEDs on one trailer which worked fine and Halogens on the trailer that did not work. They would flash once when you put truck in reverse but that was it. Changed the Halogens to LEDs and works great now. Undoubtedly the Halogens were drawing more current (Amps) than the truck thought the circuit could support and shut the power to the back up lights off.
Anyway, I have a utility trailer that I added LED backup lights on. Worked great when plugged into my Tundra but I just plugged the trailer into my new 2025 HD2500 and all the lights (brake, left & right turn signals, and running lights) work fine except for the back up LEDs.
I'm also getting a check backup lights reminder/warning on the dash.
NOTE: On this trailer I'm using an adapter to go from round RV trailer receptacle down to flat connector.
Any ideas?
Thanks in advance for any help!
UPDATE 8/27/25: I hooked my other trailer up that uses the round 7 Pin connector and the backup lights work. So, I don't know at this point if it has something to do with using the Round 7 Pin to Flat 5 Pin adapter or if something is actually wrong with my trailer lights. I'm figuring the latter. Will update with results.
UPDATE: 9/2/25
Trailer back up light problem fixed!
So, I thought I had LED backup lights on the trailer, turns out I had LEDs on one trailer which worked fine and Halogens on the trailer that did not work. They would flash once when you put truck in reverse but that was it. Changed the Halogens to LEDs and works great now. Undoubtedly the Halogens were drawing more current (Amps) than the truck thought the circuit could support and shut the power to the back up lights off.
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