Check your flasher unit. It is a silver cylinder in or next to your fuse box, it actually controls the flashing itself. I spent $100 trying to fix a similar problem on my Chevy pick up to find out it was this $2 part the whole time.
Had short in trailer light, blew fuse, checked traile, thought fixex, did not, blew turn signal fuse along with emergency flasher fuse, checked again, found problem, but no lights, replaced fuses, nothing works, have checked everything I know, even pulled stering wheel checked swith, nothing wrong, has me at wits end, plesse advise
have you checked the fuses?
Assuming you have checked all of the bulbs, sockets and wiring, the signal flasher could be weak or the signal switch is bad.
check the ground on your tailights R.W: Have you checked the turn signal switch? That may have to be replaced.
The airbag warning signal might flash on the Hyundai Sonata dashboard if the component is malfunctioning. It should be checked by a mechanic.
Only thing left is two things: 1. Turn signal switch 2. Wiring between switch and fuses.
Have you checked your fuses? Does the turn signal light up at all? If it does, you most likely need to replace a flasher.
Have you checked the fuses or bulbs?
Take your car in to have it checked. Turn signals should work without high beams.
OK, if the left turn signal light flashes on the trailer when you hook it up I would pretty much think it has to be the bulbs or sockets are bad in your truck. I'd put a new bulb in and seee what happens before anything else. If no help, pull one of the bulbs and put a test light in there and see if it flashes.
they could have burned out, or the wires are bad. I recommend getting it checked by a mechanic ;)
Have you checked your fuses?......if its not a fuse it could be a ground or burned wire. maybe even the brain......