Turn signals on the side of the fenders not working

So my side turn signals (the ones on the left and ride fenders) aren't working. I've replaced the bulbs and all my fuses. All my other turn signals work, but those ones don't, so whenever I use my turn signals all the functioning ones just flash really fast.

Any ideas at this point? What else can I try? I have another turn signal switch, but I have a feeling that's not the problem.

If you're talking about the side marker lights, in front of the wheels, those aren't supposed to flash. They just light up when you turn the headlights on.

But if youre talking about the ones that sit in the chrome 'bullets' on top of the fender, then I can't chime in.

Agree from factory they don't flash,but I did read an article about how to make them do it years ago. Didn't stay on constant and have a high (brighter) flash. What it did was stay on (park) then went out as signal flashed. Our lighting expert, /6dan , may have to chime in if he knows of the wiring changes to make it happen.

either way, my turn signals on flashing faster than normal and not making the sound, so I assumed it was the side marker light. I could've sworn they used to flash though! They don't light up at all now.

The sidemarker lights come on steady when you turn on the parking lamps, and they stay on steady when you turn on the headlamps. You can (and should, if you're in there working on the wires) make a simple mod to the front sidemarker light wiring so they burn steadily as sidemarkers and flash with the turn signals; see here.
This is a very good safety improvement, as your turn signals become visible to
the side instead of just front- or rear-on. Do it only to the fronts, though, not to the rears.

You say your sidemarkers don't light up at all. Are your parking and tail lamps working? Because the sidemarkers are fed off the same circuits (front sidemarkers + parkers, rear sidemarkers + tails). If the parkers and tails are working, then have you checked to make sure your dead sidemarkers aren't just because of burned-out bulbs?

Extra-fast flashing of the turn signals means you've got a burned-out turn signal bulb OR an improper park/turn or brake/tail bulb OR a ground fault at one or more park/turn or brake/tail sockets OR a faulty flasher.

Thanks /6dan I had faith you would know about it.

Dan, quick question; why only to the fronts and not the rear?