Turn signals not working?

Hello,

It sounds like the combination flasher is out here is the location of the flasher and the blinker wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the fuse panel and relay locations (Below). Please let us know if you need anything else to get the problem fixed.

Cheers

Suspect the flasher unit. It's no longer the common sense, reliable three-dollar flasher. It's now a very expensive electronic module. Sorry I can't remember exactly where it's located but if the hazard flashers still work, you can follow the clicking noise to the unit. On vehicles where that flasher is plugged in and sitting sideways, its weight often pulls it partially out of the socket. Simply reseating it will get it working again.

Did you use a voltage tester at the applicable fuse/s? The hazzard fuse circuit, should be hot all the time. The one for your turn signal should go hot when you turn on the key. Note diagram below.

If that checks out, probably the multifunction switch, but, If you want to get under the dash and check wiring circuits for voltage, we can do that, also.

Do the hazard lights work? If they do then the turn signal switch is most likely at fault. If the hazards do not work either than the combination flasher may be faulty.

Have you replaced the flasher itself?

Under the bed (rear) I think driver's side is a plug that runs power to all lights. Make sure it isn't loose or damaged. Also, check to see if you are getting power to that point.

Let me know what you find.
Joe

What you should find is the problem occurs with just the tail lights turned on. That is due to a bad ground wire. You can prove this by turning on just the tail / running lights, then the left signal, then remove the signal bulb from the other side. If the left bulb goes out when the right one is removed, the left one has a break in the ground wire. With the running lights off, current goes through the left signal bulb, can't find a path to ground to complete the circuit so it looks for an alternate path. That is to double-back through the tail light filament in the same bulb, then go over to the tail light on the other side, through it, then to ground. Since three filaments are in the circuit now, there's three times the resistance, which means one third the normal current flow, and that's not enough current to heat up the heating element inside the flasher assembly, so it either flashes real slowly or not at all.

To know if the problem is in front or in back, if the bad ground is for a front bulb, the turn indicator on the dash will light up dimly too.

I'd have to check voltage to and from the ignition switch. Applicable fuses, did you check for voltage, use a voltage tester. Some won't go hot till you turn on the key. Let us know what you find?

Hi, my info shows the turn and brake use the same bulb filament, lower rear, not at the same time. Brown wire with lite green tracer is voltage for turn. Comes from the multifunction switch. Tracing the wire toward the switch, the wiring color changes to brown/yellow. There may be a multiwire connector under the dash close to steering column, for circuits going to and from the column. You may be able to check brown and yellow wire there for voltage. All repair info says to disarm air-bag, where applicable, when working around the column.