HELP! Dash lights flash with turn signals / hazards....

I recently noticed that when I use my turn signals (while the headlights/running lights are off) some of my dash lights blink with the turn signals. When I use my hazards, my license plate lights will blink along with the dash lights too. My truck does have a few aftermarket electrical accessories, but they've all been installed for some time before I noticed this issue.

Pertinent electrical accessories are...
-OEM "auto" headlight switch
-Fortin remote start
-LED running and brake lights (turn signals are OEM incandescent)
-OEM LED headlights

I've tried swapping out led bulbs for incandescent, no change.
I've tried unplugging the auto headlight switch and using the hazards, no change.
I've unplugged the hot lead for the DRL, no change
I've also contacted Fortin who stated it's not possible for their unit to do this.

I was told that it could be an issue with the trailer plug or trailer plug module, but I don't even know where to start with that. I've included a link to a YouTube video of the issue for further clarification. If anybody has run into this issue or can offer some advice I'd greatly appreciate it. Thanks!

 

Anybody?

 

That's crazy...and it does it all the time?

 

I had this happen when I installed the 2020 OEM PRO headlights some time ago. It is because there is a wire in the factory harness that isn't in the right place when it is connected to the headlight harness. When I got done installing mine it was 4:55 in the afternoon and the store in which I bought them closed at 5pm and even though I called them right at 5, they were still very helpful. I don't know who you purchased your OEM LEDs from but call their service department and explain exactly what wires are connected to factory harness and they will tell you exactly which ones to switch.

I hope this helps.

 

Hi I am having that same problem can you help me on what wires are wrong thank you

 

anyone know why my lights on my plates flash with turn signals

 

I had this issue when installing led lights in the taillights. It ended up being the wiring in one of the led lights that had bad ground. Had to take each one out one by one to determine the source.

 

Thanks for the reply, I'll check for continuity this weekend.

 

Saw how old this post is but has no resolution just wondering if anyone has figured out the problem I have the same issue with a 2015 tundra SR5 4x4 have been trying to figure it out the last two days

 

I never did figure it out. Thanks to the insane gas prices I ended up parking the Tundra for a while, so it's been out of sight, out of mind.

 

Just an fyi I've been trying to figure it out and using a friends Tundra that works normal I looked at and switched bulb sockets, flasher relay, body control module, hazard switch and turn signal switch assemblies, checked ground connections and junction blocks to no avail.

 

I noticed this EXACT problem a ~week after i had purchased my 2007 SR5, some clown LITERALLY crossed the wires on my left headlight of the blinker & marker (parking) lights . they wires are color coded so just have a look and it'll be obvious, my dash lights slightly blinked with my left blinker....

 

Has anyone figure this out? Im having the same issue on my 16. But once I turn my lights on the interior lights stop blinking.