Turn Signal / Flasher Stopped Working

This has probably been covered before but -

2003 4x4 Regular Cab 2.7

Recently the right front turn signal and flasher stopped working. This is only the right front. I have replaced the bulb with a known good bulb. No physical damages. The wiring looks fine.
Possible causes - fuse, relay, column switch, broken wires, etc.
Any thoughts on the likely culprit? Or where to look?

Thanks for your help.

 

Have you checked the power and grounds on the bulb socket?
This will help narrow down the direction to take to properly diagnose the issue.

Green/Yellow wire is power
White/Black wire is Ground

You could also try the Hazard switch to see if it works then.
If so, the problem is likely the turn signal switch.

 

I venture corroded socket which might test good with the meter.

My first go to is to check the hazard lights see if they work.

 

my left blinker would sometimes go into this high speed blink....like the relay was frying....

Mine turned out to be the column switch......got worse over time....

the simplest forward...

 

Thank you for replies -

It did turn out to be a heavily corroded socket and plug - both caked with blue corrosion.
New plug & socket and it's good to go for another 20 years - or maybe more as it is now weather sealed.