Should Trailer Brake Lights Be Brighter with Running Lights On

Question:

Hi when I brake the trailer brake lights come on and when I turn on the headlights my brake lights come on if my headlights are on and the brake lights are on do they need to also get brighter when I apply the brake like the ones on the car do or are they ok to not change and just stay on?

asked by: Rowen T

Expert Reply:

Trailer brake lights should glow brighter when the brakes are applied with the running lights on, just like with a standard passenger vehicle. If this isn't happening with the light assemblies on your trailer I recommend making sure they are properly grounded. Check that the grounds, whether they are through a dedicated wire or through the mounting hardware, are securely attached to a clean, bare metal surface without any rust or corrosion.

If this doesn't help please let me know what type/mode light assemblies you have on the trailer and we can continue to troubleshoot.

expert reply by: Chris R