Trailer light issue

[kyfishin]

So, both of my brake lights and turn signals are working on my boat trailer. But one of my parking lights won't come on. Any ideas what could cause this? Where do I start?

Just replaced both both taillights with LEDs because had one old one that didn't work at all. Issue with parking light is on opposite side of the one that didn't work before.

[wmitch2]

Check the power at the light to see if it's the wire or the light. Make sure it's getting a good ground, (usually the problem )

[billnorman1]

Parking or running lights are powered by the brown wire unless some jackleg worked on your trailer. If the brake lights work it is probably not a ground issue. Make sure you have the right trailer wires hooked to the right ones on the LED lights.

[Nova Kaw 650]

Start with the bulb.

[CatFan]

Make sure the leads aren’t reversed. Incandescents will light when backwards, but LEDs won’t.

[Nova Kaw 650]

Make sure the leads aren’t reversed. Incandescents will light when backwards, but LEDs won’t.

Based in his original post, he only has LED's at the rear.

[billnorman1]

Based in his original post, he only has LED's at the rear.

Indeed, but LED's will sometimes partially light when hooked up wrong.

[Nova Kaw 650]

Indeed, but LED's will sometimes partially light when hooked up wrong.

Ahh, I did not know that!