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2012 Driver Tail Light Turn Signal out

Old 08-05-2017, 09:05 AM
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Unhappy 2012 Driver Tail Light Turn Signal out

decided to upgrade to LED's all around, installed with crimped on resistors, everything was fine for 2 weeks, now driver rear turn signal is out (parking light still works) got fed up after checking all connections and pulled everything out to return to halogen, some wires looked questionable, so i cut all of them and re-soldered. STILL NO TURN SIGNAL!!!! Fuse is still good, anyone with any other ideas why after being returned to stock I'm not getting a turn signal?? any input would be much appreciated as I'm not very savvy when it comes to wiring and already regret going the DIY resistor route in the first place.
Old 08-05-2017, 09:07 AM
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Try a new flasher unit/relay
Old 08-05-2017, 09:35 AM
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Originally Posted by techrep
Try a new flasher unit/relay
I don't know exactly what the 09+ have, but they don't have the easy to replace flasher unit our trucks have.
Old 08-05-2017, 11:48 AM
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Humm.. rockauto shows a turn signal relay for an 09 an EP-27.

Last edited by techrep; 08-05-2017 at 11:55 AM.
Old 08-05-2017, 12:18 PM
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Thanks for the Quick replies guys, I'm not sure if its a flasher relay issue or not (or if our 2012 models even have that quick fix idea, I looked into it before going the resistor route) my front turn signal on the drivers side still works fine, hyper flashing now due to the rears being out, also the passanger side is functioning with the resistors in as normal. Its currently nuking rain all day here, once it drys out I'll try climbing under the truck to check the grounds from the harness, but I feel like that too would put all of the lights out if it was bad.
Old 08-05-2017, 01:04 PM
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Oh.. he has a 2012.. that may be different.
Old 08-05-2017, 01:14 PM
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11-14 and probably newer use a body control module for the flasher, there are individual fuses on the bcm for each side.


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Old 08-05-2017, 02:12 PM
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RnlComp, thanks for the diagram, I'm not very familiar with reading these though, where might I find a fuse for the left rear turn signal/stop lamp to check if its blown? Per my truck manual, it shows that the fuse for the parking light is the same as the turn signal.
Old 08-05-2017, 02:19 PM
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Looks to be F14 on the body control module, passenger side kick panel. I'd check them all just to be sure with a computer safe test light or dvom.
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Old 08-05-2017, 03:26 PM
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Originally Posted by Rnlcomp
Looks to be F14 on the body control module, passenger side kick panel. I'd check them all just to be sure with a computer safe test light or dvom.
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Awesome! Thank you, I'll go take a look if/when it ever stops raining


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