dlwalker

Ok,

I searched and found no one that has answered the question or even provided a solution yet. So I am looking for things to check. What I've done thus far.

1. Check the bulbs and replaced. (Still all flashing)
2. Pulled the sockets and checked for grounding issues (found none)
3. Checked the left side against the right side (working side)
4. Swapped the relays inside in the fuse box in the engine bay (No Change)
5. Scratched my head and now am at a loss for next steps...

Any ideas and thoughts are welcome. I do have LEDs on the tails but I bought the truck like that and the left signal worked intermittently for a few days after I purchased it, but now...its all the time.

This is a 2012 F150 HD Edition

gDMJoe

HINT/TIP: You'll find posting in thesection more helpful/appropriate than General F150 Discussion posts.
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powerranger262

I would put regular, non-led bulbs in and see what happens. I'm guessing that if you want those led bulbs, you will need a ep27 flasher for leds. It's located under the steering column on the past few trucks that I have owned.

RLXXI

You have 6 turn signal bulbs, 2 up front and 4 out back, are all 4 in the rear flashing or just 1 per side?
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Stenz

Any update on the cause/fix?

dnlow

I have had the fast flashing issue in the past and it was the bulb. I have found LED bulbs to be problematic the one time I used them, so the OP's issue may be related to the LED bulbs.

Here is a trouble shooting guide...

http://www.procarcare.com/includes/c...rnSignals.html

Stenz

I'll see if this helps. Thanks for the reply.