Both front turn signal gets on

About my last thread. When i put my turn signals either left or right both of the front signals goes on.. i change both of turn signal bulb and i put back the oem headlight bulb because i swap my oem for led when i got the truck. But it does the same thing so im running out of idea here. Currently waiting for the flasher relay to arrive. Anyone that had the same thing happened or know the problem?

 

Does your truck have daytime running lights?
And it it ONLY the FRONT turn lights?
And NOT the rear turn signals?

 

Yes my flasher work as daytime running light

 

I edited my other post.

I added 2 more questions.

Is it only the front?
And NOT the rear?

 

Exactly.. back work as it should but front both side flash when i put my flasher

 

It sounds like a flasher issue?

Few more questions.
Are the head lights aftermarket?

If you remove one of the turn signal lights (just unplug the connector)
Then turn on the signal for the one you just removed, does the other on still flash?

example. Remove right signal bulb, turn on right signal.

 

The headlights bulb are after market (LED) but i put some oem one and test it and it does the same thing.. and yes the other one still flash i tried earlier

 

Sounds like a flasher issue to me.
Keep us updated when you get the new one.

 

Yeah hope that the relay will do the trick cause i don’t wanna bring my truck and pay 500$ for laybor

 

There is a SMALL chance you have a the 2 front turn signal wires shorted together.
But that's not likely. We can test it if you want?
But it will involve getting to the wiring harness on the back side of the body ecu (you are going to be there anyways putting the new flasher in)

It's the 1M connector.

DISSCONNECT 1B


Pin #1 and #11
#1 power ONLY when RIGHT signal is on.
#11 Only when Let is on.

The only reason I suggest testing it, is because @Dm93 will be disappointed if we don't.......

 

Don't we will figure it out.......
This can't be $500 hard to figure out

 

BTW, in the Test Procedure above, you'll need to back probe the harness.

 

Yes i already got there earlier lol i will try if i have time tomorrow after work.. either way in gonna put a new one

 

What back probe means?

 

It means, leave the plug plugged in, and test the connection where the wires go into the plug.

See 1m 19sec in this video. (watch the whole video though)
Honestly, I'd just stick the new flasher in since you ordered it.
If you still have the issue, you'll need to do the test above. (But I'm betting it's the flasher)

https://youtu.be/g2ST8w_0w-Q?si=fyEwDdB06tgMkelm

 

Ok thankyou very much sir