Trailer Side Marker Lights

[frenchriver1]

I have noticed that some trailer lights have a third wire at the light that allows you to hook in the wire from the side marker light, but some do not. If there is just two wires at the back lights, to which one can you join the side market wire to have the side markers ON all the time?

[roger23]

I have noticed that some trailer lights have a third wire at the light that allows you to hook in the wire from the side marker light, but some do not. If there is just two wires at the back lights, to which one can you join the side market wire to have the side markers ON all the time?

The trailer plug should have 4 wires short white wire ground, brown running & marker. green right turn, yellow left turn,

[frenchriver1]

Yes, I know about the wires from the plug, and you match them to the wires at the lights, but am stilll looking to tie in the side marker light wires to this wire harness...

[roger23]

Yes, I know about the wires from the plug, and you match them to the wires at the lights, but am stilll looking to tie in the side marker light wires to this wire harness...

They hook to the brown wire

[frenchriver1]

Thanks...