Trailer lights

Does anyone know why my factory trailer lights all flash when my hazard lights are on? I'm talking about my running lights cause yes I know my hazards are supposed to flash. I have a 2012 sec edition sr5

 

Bad ground somewhere on the trailer.

 

Did you just get the trailer or did it just start happening?

 

It just started happening I was testing out the lights and I noticed it.

 

Weird, they flash in sync with the blinkers, like same function? Or are they just flickering with no rhyme/reason?

If no rhyme/reason has to be a bad connection somewhere.

 

I checked it again. I used a four way tester on my truck and it's actually coming from my truck! Yeah doesn't sound good huh? Yes it's pulsates with the rhythm of the hazard. Do you think it's a relay going bad or a bad connection?

 

Shot in the dark here. Do any of the marker/parking lights flash when the left turn signal is on? I'm assuming you have the combination 7 round/4 flat plug on the truck. If so, the tail light spade is next to the left turn spade and if there's corrosion it's possible for current to jump across the spades. You can unplug the wiring from the back of the plug and look for any corrosion inside the plug, it'll be crusty and bluish green. If it's there, a small pick or flat screwdriver, some WD40 and some compressed air will clean it out.

 

Thanks I'll have to check that out. Yes I have the four plug with the seven round plug next to it. I'll let you guys know thanks for the help

 

I guess it's not the trailer then! Hopefully just corrosion.

 

Thanks for all the help guys. I got a wire brush & WD40 and went to town. It seems to stop after I found a little bit of corrosion. It's not doing what it was. So that's a plus for me. Sorry it took sometime to get back to ya'll

 

That's good to hear! Glad she's back up and running

 

Glad to hear @Dcuff !