Circuit to separate combined DRL & Turn Signal
Printed From: the12volt.comForum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=141435
Printed Date: April 30, 2024 at 5:44 PM
Topic: Circuit to separate combined DRL & Turn Signal
Posted By: amb_iv
Subject: Circuit to separate combined DRL & Turn Signal
Date Posted: June 25, 2016 at 11:42 PM
Hello,
My 2006 Cadillac SRX uses a 3657LLA bulb for DRL and turn signal. the lamp is driven by a two wire circuit. when driving, the bulb is lit as a DRL. turn on the turn signal, the DRL extinguishes and the turn signal flashes, returning to constant DRL after turn signal is cancelled. Thus I have amber DRL's.
I'd like to split these functions into separate circuit, and run a third wire into the bulb. My goal is to have a white DRL with an amber turn signal - like a switchback LED bulb.
The current power to the lamp, and the two new outputs I want to have are functionally shown in this picture:
OK I know what I want but I don't know how to do it. Could someone suggest a circuit design?
thanks
Mac
My 2006 Cadillac SRX uses a 3657LLA bulb for DRL and turn signal. the lamp is driven by a two wire circuit. when driving, the bulb is lit as a DRL. turn on the turn signal, the DRL extinguishes and the turn signal flashes, returning to constant DRL after turn signal is cancelled. Thus I have amber DRL's.
I'd like to split these functions into separate circuit, and run a third wire into the bulb. My goal is to have a white DRL with an amber turn signal - like a switchback LED bulb.
The current power to the lamp, and the two new outputs I want to have are functionally shown in this picture:
OK I know what I want but I don't know how to do it. Could someone suggest a circuit design?
thanks
Mac
Replies:
Posted By: tonanzith
Date Posted: June 25, 2016 at 11:51 PM
Posted By: amb_iv
Date Posted: June 26, 2016 at 2:02 PM
thanks for the question. I've marked up the factory schematic maybe this will make more sense:
what I've done is cut the factory wire to the amber bulb and added this new mystery circuit.
while I'm showing the turn and DRL lamps as two seperate bulb, I was planning on using 3157 WHITE/ amber switchback LED's.
you see, when I put a switchback LED into the SRX as is, it will only illuminate the amber LED's. there is no second circuit to power the white LED's. that's what I'm looking for, a circuit to split the combined DRL/TS hot wire into separate wires.
thanks for the help everyone!
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2006 Cadillac SRX
what I've done is cut the factory wire to the amber bulb and added this new mystery circuit.
while I'm showing the turn and DRL lamps as two seperate bulb, I was planning on using 3157 WHITE/ amber switchback LED's.
you see, when I put a switchback LED into the SRX as is, it will only illuminate the amber LED's. there is no second circuit to power the white LED's. that's what I'm looking for, a circuit to split the combined DRL/TS hot wire into separate wires.
thanks for the help everyone!
-------------
2006 Cadillac SRX