No trailer turn signals

Got a test light?

 

K, just have to find where the signal is getting lost. I'd start by turning on only your left or right blinker. Take that test light and unplug the end of the pig tail that plugs into your trailer. Try to find where the current is flowing through, should be going on/off ... also try it for the other blinker, is the signal making it this far, for both sides?

If you want to test your test light first just put marker lights only on then find whichever hole turns those on

 

Yes - I thought all the turn signals weren't working?

What is working and what isn't working?

 

I'd say for left middle it's probably just a bad bulb ...
For right side maybe you got a bad bulb in the middle and on the end but i'd do the test light check for right side at back of pigtail and if that is working line it up to whichever male end it plugs onto on the trailer, take off that box and see if signal is making it through that box ...

I have had it happen where it was getting lost somewhere inside that box on front of trailer ... and fuses on it were all fine also ...

 

Whatever you do,don't get lazy and use the probe to poke thru the insulation to check the wires. You will only have a bigger mess in a couple weeks or months. Probably when you come to a coops and its raining.
Also you could be losing your connection behind the trailer side of connection inside. Those terminals after a while will corrode and short out. My trailer has the main wires from plug go all the way to the back of trailer and then back up each side for the marker and turn light.
Pull and check all your lights to see if the lights are bad or the pigtail. If you put a light you know is good in each pigtail as you test.
Good luck. Electric gremlins can move and multiply.