LED turn signal bulbs?

**Kestana** · November 16th, 2015 02:14 PM

Anyone know where I can buy LED turn signal lights? I'm specifically looking for one with on a BA15D/1157 socket with a switchback function (dual light, amber + white). Also, would those stores also sell the accompanying load resistor for the LED bulbs?

From what I know, most cars will cause the signal lights to hyperflash when using LEDs without a load resistor because the car thinks the bulbs are burnt out. Burnt out bulbs = lower load. LED bulbs = much lower load than filament bulbs, so car thinks it's a burnt bulb. Is this still true or have they come up with turn signal LED bulbs that don't require a load resistor anymore?

Additionally, I believe OBD2 tools (like those Bluetooth/wifi OBD2 interface that connects to your smartphone) can clear the "burnt bulb" error to prevent the hyperflashing. Has anyone tried this instead of using a load resistor with their LED turn signal bulbs?

Btw, these LEDs with switchback function would look like this. If not using the turn signal or hazard lights, they would function like DRLs.

**WallyWest** · November 16th, 2015 11:19 PM

There's someone in miragepilipinas selling something like that. Check their forum.

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**Stigg ma** · November 17th, 2015 09:52 PM

in my opinion, mas ok pa i-LED ang brake lights kase pag may OEM keyless entry ka, ma visual check mo naman kung busted ang signal lights mo every time you lock/unlock your car... the cost of a 20-40 pesos filament bulb vs LED is just way to off...

**oj88** · November 17th, 2015 11:15 PM

I ordered two pairs of 1156 yellow LEDs together with an aftermarket variable-speed flasher relay from eBay. Putting load resistors is such a brute-force approach as they tend to heat up. I decided to just replace the OEM flasher relay. Plug-n-play and no wire splicing. Items are scheduled to arrive sometime next week or so.

I already have the brake light mod using 1157 red LEDs. I'm also going to replace the T15 high-mount brake lamp to a red T10 LED.

**Kestana** · November 18th, 2015 12:15 AM

Originally Posted by oj88

I ordered two pairs of 1156 yellow LEDs together with an aftermarket variable-speed flasher relay from eBay. Putting load resistors is such a brute-force approach as they tend to heat up. I decided to just replace the OEM flasher relay. Plug-n-play and no wire splicing. Items are scheduled to arrive sometime next week or so.

I already have the brake light mod using 1157 red LEDs. I'm also going to replace the T15 high-mount brake lamp to a red T10 LED.

Yes, having a load resistor defeats the purpose of the LEDs being efficient. But I'm after the switchback function and unfortunately, I've yet to find out if my car still uses a flasher or if it's regulated by the ECU. If it's regulated by the ECU, I suppose one of those OBD2 chips can clear the error to eliminate the hyperflashing.

**oj88** · November 18th, 2015 08:41 AM

You may be able to clear the DTC temporarily but if the error condition still exist, you're likely to receive frequent notifications about burnt bulbs.

You probably need those LEDs that has CAN bus decoders. They're no more than LEDs with built-in resistors, or so I've read.

**Horsepower** · November 18th, 2015 08:54 AM

Been thinking of this mod too. My brake lights and third brake light are already LED but my signal lights aren't. However, my sidemirror signal lights are LED. Does it mean I can just swap the bulb with LED and it wouldn't hyperflash? Been thinking of getting branded ones from Philips and Osram. TIA

**oj88** · November 18th, 2015 09:47 AM

Originally Posted by Horsepower

Been thinking of this mod too. My brake lights and third brake light are already LED but my signal lights aren't. However, my sidemirror signal lights are LED. Does it mean I can just swap the bulb with LED and it wouldn't hyperflash? Been thinking of getting branded ones from Philips and Osram. TIA

Try removing one of the filament bulb and see if it hyper-flashes.

The LED response time is clearly superior. The improvement in reaction time of the driver behind me due to LED brake lights may be annecdotal, but I'd like to think that in theory, every few milliseconds help.

The LED turn lights are purely for aesthetics, though.