wiring my led side mirror covers

Hello all~! I'm glad to have found this wonderful Internet resource and equally glad to be here. I feel like such a noob after browsing through all these diagrms and articles. :P I come humbly asking for your expertise and experience in all-things electrical. :)

My reason for making this thread--I need assistance & confirmation on how to wire up my LED side mirror covers for my 2004 Tiburon.

The side mirrors I ordered look like this:


And it has 5 wires coming out of each side mirror cover:

** 2 wires for the turn-signal wires--(-) and (+)

** 1 (+) wire for the always-on side mirror LED

** 2 wires for the puddle lights underneath the mirror cover--(-) and (+)

After looking at the DEI wiring diagram for the Tiburon, I've come to the conclusion that the wiring should be done this way.

** LED mirror driver-side turn-signal (+) wire --> BCM, 22-pin plug, pin 13 (+)(RED / orange) (Turn-signal left)
** LED mirror driver-side turn-signal (-) wire --> good ground point

**LED mirror passenger-side turn-signal (+) wire --> BCM, 22-pin plug, pin 17 (+) (orange) (Turn-signal right)
** LED mirror passenger-side turn-signal (-) wire --> good ground point

** LED mirror "Always-on" LED (+) wire --> BCM 22-pin plug, pin 10 (+) or pin 5 (+) (left or right parking light power wire)

** LED driver-side puddle light (+) wire + LED mirror passenger-side puddle (+) wire --> 87 on a SPST relay
** BCM, 8-pin plug, pin 3 (-) wire --> 85 on a SPST relay
** 86 + 30 --> Fused 12V+.

Here is a diagram I drew up. Can you tell me whether I'm on the correct path?


If anyone can confirm or give advice, you have my utmost gratitude~!! :)

On the puddle lights, eliminate the relay and apply constant 12v to the puddle light positive, and use pin 3 for ground.  The LED pulls less current than the Relay coil.

I did not check your BCM connections, but it appears as though you have done your research. 

Use a meter to verify that the connections you found act as they should when your blinkers are on, and when you open a door.

i am an idiot wrote:

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On the puddle lights, eliminate the relay and apply constant 12v to the puddle light positive, and use pin 3 for ground. The LED pulls less current than the Relay coil.

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Sorry if this is just noob-talk but if I connect the (+) puddle light wires to a constant-on +12V source and connect the (-) puddle light wires to the BCM 8-pin plug pin 3 yellow wire (with negative polarity), wouldn't the puddle lights always be on? The reason I'm not sure is because a friend with a 2007 Sonata has the same type of negative polarity wire for the dome light and he had to use a relay for the dome lights.

What is the yellow wire at pin 3?  

i am an idiot wrote:

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What is the yellow wire at pin 3?  

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Per DEI's DirectWire, the pin 3 yellow wire is:

Dome supersion -- Color yellow -- Polarity (-) -- BCM, 8 pin plug, pin 3

You are using the relay to convert the polarity of that wire.  Since your puddle lamp has 2 separate wires, you do not need to convert the polarity.  Check that wire with a volt meter.  You will see that there is 12 volts on that wire anytime the dome light is off.  Then when the dome light is on, there is now ground on it. 

12 volts on puddle lamp positive wire, and 12 volts on puddle lamp negative wire = no illumination.

When the dome light comes on it will ground the negative wire and illuminate the puddle lamps.

i am an idiot wrote:

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You are using the relay to convert the polarity of that wire.  Since your puddle lamp has 2 separate wires, you do not need to convert the polarity.  Check that wire with a volt meter.  You will see that there is 12 volts on that wire anytime the dome light is off.  Then when the dome light is on, there is now ground on it. 

12 volts on puddle lamp positive wire, and 12 volts on puddle lamp negative wire = no illumination.

When the dome light comes on it will ground the negative wire and illuminate the puddle lamps.

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I see. I'll wire the puddle lights as you say. Thanks~!!

And once I finish the job, I'll post an update in this thread. :)

i am an idiot wrote:

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You are using the relay to convert the polarity of that wire.  Since your puddle lamp has 2 separate wires, you do not need to convert the polarity.  Check that wire with a volt meter.  You will see that there is 12 volts on that wire anytime the dome light is off.  Then when the dome light is on, there is now ground on it. 

12 volts on puddle lamp positive wire, and 12 volts on puddle lamp negative wire = no illumination.

When the dome light comes on it will ground the negative wire and illuminate the puddle lamps.

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I have one more question. So if I wire the puddle light positive wire to a constant +12V source and wire the puddle light negative wire to Pin 3, will this setup harm the puddle light LEDs in any way? B/C both wires will be fed +12V until the dome light is activated?

Just wanted to pop back in here to say Thank You~! for your help.

I got my LED mirrors installed & working correctly. :)