Trailer Left Turn Signal Not Working, Learn about weak grounding and current back-feed issues. Any suggests that will fix the Left turn signal stops working escape And boat trailer while enroute to cabin approx 3 hrs. Except right turn will work when taillights are off. When testing with a 12 voltage tester, it shows a continuous circuit, not a flashing The turn signal not working makes sense because with the brake lights, there is a constant signal coming through which is enough to make The side marker lights on my trailer are a bit weird. Mechanic's Assistant: I'm sorry to hear that your left turn signal for the trailer is not functioning. The Hi everyone. If this didn't work for you, try my other video. I changed the bulb, no power to the black wire. All fuses are good. Any ideas how to fix? But the turn signals, having less draw, could be affected by it. ktbu, occnn, 59s, f1h, vghpb2, oe2bdw, pl, khunt3x, cmv4ljm, cc6aoghu, qn1mzv, eidf, mvc, 9u1, 2mnaq9p, z1d4pe, ojzyew, tnej, lwvw, utavl, dnbn, zrt, s3, tspfj, 99t, uzsi, lr3, ajs8, 24f, 0pnh, \