Turn signal comes on with marker

Bad ground.. check your tail light wiring

 

Check your ground for the markers, sounds like current is runnin straight through the markers rather than grounding.

 

Bad ground to tractor..

 

When I use my right turn signal, my trailer brakes lock up

 

Have tried this, turn off all the lights and put the 4 way flash on and check all lamps that should be flashing. If one isn't working then the lamp may be bad ???

 

First would be to check grounds at the lights. The other would be a bad bulb were the filament broke and is hitting the other and sending juice thru that circuit kicking the dash light on.
Dave ----

 

Or you can do it the old way with 4ways blinking take a rubber hammer an tap each one till the bad one shows a diff. blink/pattern then replace that light bulb,witch will turn out to be a cheap china replacement bulb?

 

my kenworth's clearance lights on the hood(Right side) keep running and also the right signal Arrow on the dashboard is on continuously. what could be the problem?

 

On all the time? Turning on what accessory makes the lights turn on?