Front turn signal issues

[johnnytequila]

I am trying to post the video of my front turn signal not flashing when in use. It’s intermittent and was only the left but yesterday the right front did it. My wife was able to record it. I still have a warranty and I will probably surrender and have the dealership look at it but I wanted to see if anyone else had this issue?

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[coz0502]

Did you confirm the bulb is not bad? I'm not as familiar with the GT350 but remember when I put the switchback lights in my 16 GT, there was a dual filament bulb in there that light up for running lights and then blinks as well. In the video it looks like the running light is working just no blinking. That would be the first thing I'd check if you didn't already.

 

[johnnytequila]

But it’s not out, just doesn’t blink and it’s intermittent on both sides. My troubleshooting with my blue driver found a code about the body control module. The first owner took it in once for that. I took it in a year ago when I first bought it And that was only the left front and yesterday the right front did it.

B123A-11 Left Front Turn Indicator - Circuit Short To Ground

B123A-15 Left Front Turn Indicator- Circuit Short To Battery Or Open



Fixes:

Bulb (if applicable)

Front Park lamp/Turn Lamp Assembly

Rear Lamp Assembly

Exterior Mirror Lamp Turn Signal Assembly

Driver Door Module

Passenger Door Module

Body Control Module

Wiring Harness/Connector

 

[Mike Pfeifer]

But it’s not out, just doesn’t blink and it’s intermittent on both sides.

If its a dual filament bulb, one filament can still be working (driving light / parking light filament) and one be intermittent or out (turn signal filament). Its like 2 bulbs in one.

 

[johnnytequila]

You could be right but once they burn out, they don’t work again, right? Both sides? I appreciate your input. Just trying to figure it out because this was an issue before I even got the car.

 

[coz0502]

It could have broken the blinker part of the filament, and theoretically that broken filament could be making slight contact creating the intermittent issue you describe, but based on the codes you're getting I don't think that is your problem unfortunately. Sorry it's not an easy fix, good luck.

 

[snake bite]

I am trying to post the video of my front turn signal not flashing when in use. It’s intermittent and was only the left but yesterday the right front did it. My wife was able to record it. I still have a warranty and I will probably surrender and have the dealership look at it but I wanted to see if anyone else had this issue?

Hi mate I am having the same issue on my 2016 Right hand drive mustang but only on the drivers side front (right hand side). It's driving me crazy. I thought potentially the LED so removed and replaced with oem bulb and same issue. For some reason it seems to happen more while car is running. I'm at a total loss, I'm thinking potentially the turn signal switch is faulty?. Or power relay/flasher Really keen to hear how you go fixing this, please let me know. I may have to go to an auto electrician.

 

[johnnytequila]

Actually I had it resolved by my dealership. They escalated it after they replaced the body control module and turned out it was a bad light socket. They replaced it and has never been an issue since.

 

[snake bite]

Actually I had it resolved by my dealership. They escalated it after they replaced the body control module and turned out it was a bad light socket. They replaced it and has never been an issue since.

Nice its fixed I bet. So did they just replace this part in the picture and not the part it plugs into with all the wiring

 

[josephstef]

Nice its fixed I bet. So did they just replace this part in the picture and not the part it plugs into with all the wiring

Hey did you try unplugging the battery for around 5 mins after you changed the bulb? Sometimes the BCU cuts power as a safety and you need to reset it.

 

[snake bite]

Hey did you try unplugging the battery for around 5 mins after you changed the bulb? Sometimes the BCU cuts power as a safety and you need to reset it.

No I didn't, I guess I could give it a go. Not sure it will make a difference because the signal works but it's intermittently.... electrical is a pain and makes you chase your tail

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