Exterior Turn signal failure - Subaru Impreza WRX STI Forums: IWSTI.com
STI Forum
Join
Start New Thread Create Account Advertise FAQ Members List Contact
Turn signal failure
Turn signal failure
Go Back   STI Forums > > > Exterior Turn signal failure
Reply
 
Thread Tools
Old 06-16-19, 11:00 AM   #1
Grandprix
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2017 Pure Red STI
Fav Mod: Interior exterior LEDs
My Threads
Posts: 163
My Subaru Parts for sale

Join Date: Jan 2015
Location: Floriduh native
Grandprix is on a distinguished road
Default Turn signal failure

LED front and rear Subispeed tail light mod for turn signals.
I use a Valenti flasher relay to compensate for the resistance.
My left signals stopped working and the dash panel arrow also stopped illuminating. The relay still clicks though.
I put the hazards on with left signal on the stalk and voila all is well.
Tried a few more times and it stopped again.
Thoughts, ideas?
Replace the relay? The new rear light mod ?
Thanks
Grandprix is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old 06-17-19, 08:27 AM   #2
drummerboy
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 17 STI SportTech WRB
Fav Mod: Tightening the nut behind the wheel
My Threads
Posts: 131
My Subaru Parts for sale

Join Date: Jul 2016
Location: Canada
drummerboy is an unknown quantity at this point
Default Re: Turn signal failure

The flasher relay is the cheapest test fix. Diode Dynamics makes one that I haven't had problems with after 3 years so far, and its customizable too (number of tap-to-turn blinks, hazard blink pattern, lock/unlock light timer etc.)
drummerboy is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-17-19, 09:36 AM   #3
DarkSi08
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2019 STI Limited CWP
Fav Mod: JDM STi Mirrors
My Threads
Posts: 109
My Subaru Parts for sale

Join Date: Jun 2012
Location: Charlotte
DarkSi08 is on a distinguished road
Default Re: Turn signal failure

Quote:
Originally Posted by drummerboy View Post
The flasher relay is the cheapest test fix. Diode Dynamics makes one that I haven't had problems with after 3 years so far, and its customizable too (number of tap-to-turn blinks, hazard blink pattern, lock/unlock light timer etc.)
I agree... When you're messing with aftermarket lighting, it's always a toss-up when it comes to what is wrong - but a flasher relay is relatively cheap, and pretty easy to replace. I also recommend the Diode Dynamics.

The only other thing to check - assuming you've already checked the fuses (though the clicking relay should rule that out), is going back to stock lighting.
DarkSi08 is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old 06-17-19, 03:07 PM   #4
Grandprix
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2017 Pure Red STI
Fav Mod: Interior exterior LEDs
My Threads
Posts: 163
My Subaru Parts for sale

Join Date: Jan 2015
Location: Floriduh native
Grandprix is on a distinguished road
Default

Would hate to have to reinstall the original turn signals.
Fuses are ok because the problem is intermittent.
I ordered a replacement relay.
Grandprix is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-21-19, 10:28 AM   #5
Grandprix
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2017 Pure Red STI
Fav Mod: Interior exterior LEDs
My Threads
Posts: 163
My Subaru Parts for sale

Join Date: Jan 2015
Location: Floriduh native
Grandprix is on a distinguished road
Default Re: Turn signal failure

Update.
Installed the Subispeed flasher relay.
No luck. In fact now the hazards won’t blink when the dash is powered up. Hazards are fine with power off the car and hazard button selected.
Left turn signals dead. Right is fine.
Replace left original rear light assembly. As above. My original assembly is outfitted with all LED bulbs but hazards and turn signals are dead.
Anybody have further ideas or trouble shooting. I am going to check the manual for fuse and relay locations.
I am stumped.
Grandprix is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-21-19, 10:33 AM   #6
yamahaSHO
BROtuner
Feedback Score: 7 reviews
 
Car: 2005 WRB
Fav Mod: Equal Length Header
My Subaru Parts for sale

Join Date: Oct 2007
Location: Denver, CO
yamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant future
Default Re: Turn signal failure

MFS? I just had one fail in my Jeep and had to replace it.
__________________
Looking at turbo upgrades? Click here.
jaz|TUNING

yamahaSHO is online now  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-21-19, 12:31 PM   #7
Grandprix
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2017 Pure Red STI
Fav Mod: Interior exterior LEDs
My Threads
Posts: 163
My Subaru Parts for sale

Join Date: Jan 2015
Location: Floriduh native
Grandprix is on a distinguished road
Default Re: Turn signal failure

Possibly a ground fault?
Grandprix is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-21-19, 12:31 PM   #8
Grandprix
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2017 Pure Red STI
Fav Mod: Interior exterior LEDs
My Threads
Posts: 163
My Subaru Parts for sale

Join Date: Jan 2015
Location: Floriduh native
Grandprix is on a distinguished road
Default Re: Turn signal failure

What is MFS?
Grandprix is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-21-19, 01:17 PM   #9
yamahaSHO
BROtuner
Feedback Score: 7 reviews
 
Car: 2005 WRB
Fav Mod: Equal Length Header
My Subaru Parts for sale

Join Date: Oct 2007
Location: Denver, CO
yamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant futureyamahaSHO has a brilliant future
Default Re: Turn signal failure

Multi-Function Switch.

Your blinker stalk.
__________________
Looking at turbo upgrades? Click here.
jaz|TUNING

yamahaSHO is online now  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-21-19, 04:20 PM   #10
Grandprix
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2017 Pure Red STI
Fav Mod: Interior exterior LEDs
My Threads
Posts: 163
My Subaru Parts for sale

Join Date: Jan 2015
Location: Floriduh native
Grandprix is on a distinguished road
Default Re: Turn signal failure

Quote:
Originally Posted by yamahaSHO View Post
Multi-Function Switch.

Your blinker stalk.
Thanks.
I had no idea what a MFS is, but I am in the SMF club though.
I may have isolated it to the left rear view mirror turn signal. If so, it would be covered by warranty.
Grandprix is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


New To Site? Need Help? More

All times are GMT -8. The time now is 09:30 AM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Designed & Powered by Domain Architect
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.