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Old 08-08-2012, 09:48 PM   #1
Dezrador33
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Member#: 295378
Join Date: Sep 2011
Chapter/Region: Tri-State
Vehicle:
2011 Impreza 2.5i
Camellia Red Pearl

Default LED Switchback problem

I had a very weird problem with a set of LED switchbacks for my 2011 Impreza.
I had purchased http://store.ijdmtoy.com/1157-2357-7...157_sku317.htm
After installation, anytime I would apply my brakes, turn on my headlights, fog lights, or high beams, the white "running light" would turn off completely then either come back on a second later or just not come back on at all. Its quite annoying and I am sending them back but I wanted to know if maybe someone can figure out what could have caused that?
Thanks!
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Old 08-09-2012, 12:49 PM   #2
LIChuck
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Join Date: Dec 2010
Chapter/Region: Tri-State
Location: Patchogue, NY
Vehicle:
2007 WRX Limited
UGM

Default

How did you install them? In an existing socket or did you install them in a new socket/fixture?
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Old 08-10-2012, 09:46 AM   #3
bassman12350
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Member#: 230795
Join Date: Nov 2009
Location: Twain Harte, CA
Vehicle:
2011 Impreza WRX 5dr
WR Blue Pearl

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I do not think the switchback LED bulbs will work properly in the Impreza. I also have an '11; there is no power applied to the bulb unless the turn signals or 4-way flashers are activated. I believe residual voltage present in the circuit backfeeds the white LED running light, but any time there is a change in the voltage (brake lamps, head lamps, etc. being turned on), the backfeed voltage is lost.

I'd return them and just use the high output 1157 LED amber turn signals bulbs.
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Old 08-10-2012, 02:37 PM   #4
Dezrador33
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2011 Impreza 2.5i
Camellia Red Pearl

Default

Quote:
Originally Posted by LIChuck View Post
How did you install them? In an existing socket or did you install them in a new socket/fixture?
They were in the stock socket, nothing new or anything.
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Old 08-10-2012, 02:42 PM   #5
Dezrador33
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Camellia Red Pearl

Default

Quote:
Originally Posted by bassman12350 View Post
I do not think the switchback LED bulbs will work properly in the Impreza. I also have an '11; there is no power applied to the bulb unless the turn signals or 4-way flashers are activated. I believe residual voltage present in the circuit backfeeds the white LED running light, but any time there is a change in the voltage (brake lamps, head lamps, etc. being turned on), the backfeed voltage is lost.

I'd return them and just use the high output 1157 LED amber turn signals bulbs.
Switchbacks do work in the car. The 1157 is a two stage bulb, has a running light feature and a turn signal that is separate from that. 1156 is the single stage bulb.
If you turn the switch on the stalk up one click it turns on your ambers. Go look and see, then if you turn on your turn signal, the other part of the bulb is used. It has two filaments inside the bulb.

Here's the proof they work. http://fastwrx.com/coledtusibu.html
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Old 08-23-2012, 08:07 AM   #6
JTL88
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Member#: 279150
Join Date: Apr 2011
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2011 WRX
SWP

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I am also having this problem. I used the blinker relay from fastwrx.com, could it be a defective relay?
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Old 08-23-2012, 07:44 PM   #7
Big-E
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2006 WRX Sedan SGM
Let LED's light your way!

Default

More than likely, you have the existing and known problem with the RH front bulb-socket.

My friend installed a set of switch-back bulbs and when one of the leads to that socket became intermittently disconnected, the power fed-back into the harness and cause similar problems.

LED's are very sensitive to line-shorts and will cause feedback loops into the system.
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Old 08-23-2012, 08:43 PM   #8
JTL88
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Join Date: Apr 2011
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2011 WRX
SWP

Default

Quote:
Originally Posted by Big-E
More than likely, you have the existing and known problem with the RH front bulb-socket.

My friend installed a set of switch-back bulbs and when one of the leads to that socket became intermittently disconnected, the power fed-back into the harness and cause similar problems.

LED's are very sensitive to line-shorts and will cause feedback loops into the system.
Thanks for the info.

Do you know how the op and I can fix this problem? Other than putting the stock bulbs back in??
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Old 08-24-2012, 05:18 PM   #9
Big-E
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2006 WRX Sedan SGM
Let LED's light your way!

Default

The headlamp assemblies are installed loaded with the bulbs and sockets in place, bolted to the car, and then the harness connected.

The problem is that the radiator-support where the headlamp assembly bolts in has a vertical pillar of sorts that causes the bulb-harness portion going to the corner marker/signal socket to become pulled/pinched, thus effectively pulling the wires from the socket.

A remedy would be to remove the headlamp assembly, remove the socket from its position without removing it from the assembly. Then upon reinstallation, you first route the socket-harness in and around this 'pillar', then install the assembly, then reinstall the socket into place.

While the headlamp assembly is out, you should test the socket with a multi-meter while tugging on the wires. If the circuit opens then there is a bad wire.

I believe that a replacement socket is available.

So in short, if you reroute the socket-harness wiring around this 'pillar' you should resolve the problem.

This is also true of the tail-lamps on the sedan.

I removed them on my friends car, rerouted the socket-harnesses around the pillar and then bolted the lamps back into place.

By doing so, I had more freedom of movement for the sockets when installing the somewhat longer LED bulbs, and I wanted to avoid any similar problems as that of the RF headlamp corner bulb-socket.

I hope that this make sense.
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