98 f-150, 4.6
left turn signal failure, replaced bulb, no help, what is next step

 

fuses. wiring shorts?

 

if it was a fuse wouldn't both lights stop working?

 

The bulb that doesn't work, check its socket for discoloration, burning stuff like that, sounds like poor connection. The sockets are replaceable.

 

I put a circuit test on everything including the wires that go into the plug itself, no power at all......Is there a fuse that operates that signal? what is next step..this is frustrating

 

well its probably shorted out then, no i wasnt paying attention when i said fuse

 

Is it both left bulbs that don't work or just 1. I have a problem with mine, also the left side. My front bulb won't work. Tried changing bulbs and flasher but it didn't help. try your 4 way and see it that works. It does on mine. I' thinking it may be in the switch itself.

 

I just took my turn signal switch apart and the contacts are all corroded. As I said in my previous post, the problem lies in the switch itself. A new one at Orielly's costs 54 dollars and change, but if you're careful, you can clean the original up and it will work as good as new.