Can Tow Vehicle with LED Lights Connect with Trailer that has Incandescent Lights

Updated 07/10/2020 | Published 09/15/2018

Question:

Can i tow my old trailer with old lights, On a new car with led lighting

asked by: Ian G

Helpful Expert Reply:

Assuming the lights and wiring on your older trailer are in good condition you will not have any issues connecting with and powering its standard incandescent lights with a tow vehicle that is equipped with LED lights. The difference in light assemblies used on the vehicle and trailer will not cause any problems with function or power.

If you can tell me the year, make, and model of your tow vehicle I will be happy to recommend a trailer wiring harness if you don't already have one installed.

expert reply by: Chris R

Ken

6/29/2020

I have a new car with led lights and my trailer has incandescent lights (10yrs old+) but the installer has problems installing, even using a universal bypass kit so I'm wondering if just exchanging the bulbs to LEDs would work. Thank you.

Chris R.

7/2/2020

Having LEDs on the vehicle and incandescent lights on the trailer really shouldn't be a problem at all. What problems is the installer having, exactly? Can you tell me what model vehicle you have and what specific harness you're installing?

Jeff V.

7/7/2020

I'm having similar issues. 2019 GMC terrain with LED lights and a Carry-on trailer with incandescent lights. Having issues with left brake light and turn signal not functioning. All running lights and right turn, right brake lights work. Installer even switched out the wiring harness for one specific to my vehicle but still having issues.

Chris R.

7/10/2020

I don't think the issue has to do with the bulb type on the Terrain and trailer. Have you tested the trailer connector on the vehicle to see if the left brake/turn circuit is receiving any power? This at least tells you which side the issue is on (if you get power then the problem is on the trailer, if not then it's no the Terrain). Let me know what you find and we can go from there.