I have an 02 ranger. The front left turn signal doesnt work. Nor does the light in dash. But the rear one does. I've checked wiring there is no turn signal at the bulb at all.
I do have park light.
Flashers work except that one front right.
i changed the relay anyways.
I changed the multi switch.
Checked fuses and bulbs....

 

Welcome to the forum

The front turn and dash turn share 1 wire coming out of the multi-function switch
The rear turn uses a different wire out of multi-function switch

Left turn front and dash use a light green/white stripe wire coming out of the multi-function switch, pin 8 if they are numbered

So what I would do is to find that wire at the multi-function switch plug, unplug connector
Apply 12volts to that wire to see if the bulbs light up
If not then that wire is broken under the dash, there is a splice under the dash where the wire SPLITS, one goes to dash(cluster) the other goes to engine bay(front turn bulb)

If bulbs do light up then wiring is OK, problem is in the multi-function switch or the connector itself

There are no separate fuses for turn signals, just the one fuse #10, so if other turn bulbs work then not a fuse issue