No trailer lights

I have brake lights and turn signals but no trailer lights.Already checked all 4 or 5 fuses responsible for lights and they all look good.Any idea what else should I check? Volvo 670.

 

If you have a test light make sure you have juice out the trailer cord, cord could be bad.
Process of elimination, where does the juice stop?

 

Thanks.Correct me if I am wrong because I am ignorant when it comes to mechanical/electrical stuff but I would guess I do have juice out of cord since I have brake lights and turn signals?

 

You may only have juice to those circuits. If only the marker light circuit is bad, the others will work.

 

Is this your regular trailer, or one you just picked up?

 

Picked it up 3 days ago.I don't have regular trailer.Thank you for the plug drawing!

 

These are the reason for issues most of the time.

 

If you wiggle the plug do the lights come on? The biggest issue I had was a worn plug not making contact. You can stick a piece of plastic or folded paper in the side when you push the plug in to keep tension on it temporarily, and get a new plug or cord later.

 

If it's an older trailer with split pins, you can spread the pins a bit.