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DRL Module Wiring, Land Rover LR4 to LR3


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elocin671 
Member - Posts: 10
Member spacespace
Joined: April 15, 2011
Location: Washington, United States
Posted: July 28, 2018 at 9:40 PM / IP Logged Link to Post Post Reply Quote elocin671
Hi,
Can anyone help me figure out how to wire up my DRL's. I'm retrofitting 2015 Land Rover LR4 headlights into a 2007 LR3.
The single DRL LED strip from the LR4 has two pins that need positive 12VDC, at different times.
PIN# 2 lights up the strip as Parking lamps, at a lower voltage via its own LED controller.
PIN# 8 lights up the same strip as DRL, at full voltage via its own LED controller.
PIN# 1 is ground
So basically, I need a circuit that will provide DRL Pin# 8 with positive 12V when engine is running, and cut off all power to Pin# 8 when PIN# 2 (+12V) parking lights come on, and when engine is off.
Any help is greatly appreciated. Thanks!
elocin671 
Member - Posts: 10
Member spacespace
Joined: April 15, 2011
Location: Washington, United States
Posted: July 29, 2018 at 9:38 PM / IP Logged Link to Post Post Reply Quote elocin671
Hopefully someone can chime in if my diagram I just made will work or not, or what changes I should make. I did bench test pin 2 and 8 separately, while using pin 1 as ground and they worked as they should.
I will be making my own relay harness, and bypassing the factory wiring for those pins. Is a diode needed?
My concern is to avoid putting 12v+ on PIN 2 and 8 at the SAME time, as this would most likely fry the LED controller since it uses a single strip for DRL and sidelight (parking lights).
DRL Module Wiring, Land Rover LR4 to LR3 -- posted image.
the12volt 
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Administrator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 07, 2002
Location: Louisiana, United States
Posted: July 29, 2018 at 10:13 PM / IP Logged Link to Post Post Reply Quote the12volt
Your diagram looks good to me. If you want to add a diode across the coil of the relay, it won't hurt, but it doesn't look like it's needed.
DRL Module Wiring, Land Rover LR4 to LR3 -- posted image. the12volt • Support the12volt.com

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