Not to beat a dead horse, i read the post that was out a week or two ago.
At the time i was having the same symptoms, flashers were working, just faster than they should, it was not constant, would go faster then back to normal, then fast again. All 4 were working. This morning, no signals.

checked the 15a fuse, looks good.

should i just swap out all the signal bulbs? or did anyone come up with a conclusive weak link on these?

thanks

 

I should have added to this, i didnt check the flasher fuse, assuming it has one. i didnt see anything listed other than the 15 a turn signal fuse on the in cab panel.

so i guess next question is, does this truck use the large stle flasher fuse as well, if so, which one is it?

thanks

 

Try changing the rear bulb's. They're notorious for having problem's.

 

2 hours checking bulbs, looking for shorts, climbing all over a salt covered truck.
$2.99 flasher fuse from the the parts store, and 10 seconds to swap.
fixing one of the laundry list of To DO repairs on my dodge

priceless

 

Where did you find the Flasher Fuse, I think i am over looking something.

 

on the fuse block in the cab , the large round ones. one is hazard flasher, i think the top one, the other is turn signal flasher.