Thread: Where Should I Hook Into Turn Signal?

So I am wondering where is the best place to hook wire in extra turn signals for mirrors? Car is a 2000 GP GT. Obviously I would like to have it so the left mirror blinks when left blinker is on and the right when the right is on.

I spliced into mine right behind the fog light its self. Very easy.

04-08 has positive output directly out of the bcm for left and right so that's easy as it gets.

97-03 your best bet is probably at the light housings. Someone else can chime in if they have a better solution

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Subd so I can see how it's done when mine get installed!

If I remember right Bill hook them into the headlight switch wiring. I plan to tap into them at the gauge cluster harness since I have the wiring schematic in the HUD write up.

I looked it up in the FSM to find a front directional signal. In the Regal, I think it was located either by the BCM or at the dash to body connector. It's been a while. I also put stock wiring into the factory door connectors. I'm a little retentive when it comes to wiring.

The less distance and through stuff that you run the better. Tape it up into the factory wiring where possible to keep it clean and protected.

And..make sure with a test light that you aren't tapping into a rear turn signal. You can test this by pushing on the brake pedal.
That's right..at first I found it and didn't realize GM used the same wire for both turn and brake.

Lol. Alight. I figured I would go off of the front ones. However to throw another wrinkle in things do you think that I could get away with hooking up a front facing signal and a rear facing signal up to one side or would that draw too much?

Are u using leds

Yea. Its like a small 7 led signal I will be putting in the mirror and then an amber 6 led front facing one on the mirror housing.

Using LED's I wouldn't even bother trying to calculate load etc. They draw so little you could hook up a ton

Originally Posted by BillBoost37

Using LED's I wouldn't even bother trying to calculate load etc. They draw so little you could hook up a ton

Lol. I wouldnt say that if I were you. I will probably end up hooking up a ton now! haha

I have a ton hooked up to my interior lighting and they still draw less than the stock bulbs

You don't know me well then. I like to make changes which are either subtle and barely noticed or that appear to be standard from the factory. I thought about a fender signal or front mirror housing signal and decided it wouldn't appear factory for a GM vehicle of the period.

The puddle lights, I would have liked to have done something more involved, yet didn't care to spend the time on them. BTW, while you are running wires and will be in the mirror....if you don't add puddles... you will do yourself a great injustice.

Originally Posted by BillBoost37

You don't know me well then. I like to make changes which are either subtle and barely noticed or that appear to be standard from the factory. I thought about a fender signal or front mirror housing signal and decided it wouldn't appear factory for a GM vehicle of the period.

The puddle lights, I would have liked to have done something more involved, yet didn't care to spend the time on them. BTW, while you are running wires and will be in the mirror....if you don't add puddles... you will do yourself a great injustice.

I'm adding puddle lights to my current build of the turn signals. Thx for the idea lol

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And..I'm unsure of the 04+, but in 2000 GM decided to stop having door lights in the door. If you pull the panel and the reflector is a housing vs a reflector... add the proper socket and bulb.

Originally Posted by BillBoost37

You don't know me well then. I like to make changes which are either subtle and barely noticed or that appear to be standard from the factory. I thought about a fender signal or front mirror housing signal and decided it wouldn't appear factory for a GM vehicle of the period.

The puddle lights, I would have liked to have done something more involved, yet didn't care to spend the time on them. BTW, while you are running wires and will be in the mirror....if you don't add puddles... you will do yourself a great injustice.

I orginally had puddle lights planned but then a couple weeks ago I installed these logo projectors in the door that shine on the ground and am afraid the puddle lights will be too bright for this.




Although I could probably just install a rocker switch or something so I could switch between the logo projectors and the puddle lights.

They don't even have reflectors or anything on an 04+

Originally Posted by marines542

They don't even have reflectors or anything on an 04+

Damn.. I'd feel robbed

Originally Posted by burgundybullet

Although I could probably just install a rocker switch or something so I could switch between the logo projectors and the puddle lights.

Those are really cool. I would find the door switch trigger wire (like for an alarm) and put a relay on it. Run say pin 87a to the puddle and 87 to the projector. That way it automatically flips from walking up puddle light to the door is open (puddle off) projector.

Originally Posted by BillBoost37

Those are really cool. I would find the door switch trigger wire (like for an alarm) and put a relay on it. Run say pin 87a to the puddle and 87 to the projector. That way it automatically flips from walking up puddle light to the door is open (puddle off) projector.

That is genious! Buttttttt I have little knowlege on this relay stuff you speak of. It took me a while to figure out how to run wire for just powering stuff but now that I have it figured out that is easy. Im assuming this will be the same way. Thanks for the great idea!