Car lighting help - Adding aftermarket LED Day time running lights

[gregzz4]

Even if the above works, you'd still have to add a toggle switch for the new LEDs.
I have an idea with 3 new relays involved, but you'd have to tamper with the existing wiring.

You'd need to put a relay between the DRL fuse and the headlights. This would be called relay #2
So, relay #1 gets it's signal from the Headlight power circuit, but does not interrupt it. Contact #87 goes to relay #2 DRL circuit and is the signal input. When in Headlight mode, both fuses power the Headlights.

Relay #3 gets it's signal from contact #87A on relay #1 and powers your new LEDs. Don't forget to add a fuse to the LED power line.

When in DRL mode there's no signal to relay #1 thus killing all power to the Headlamps - contact #87 on relay #1 is open. And with the third relay your LEDs would be on.
When in Headlight mode, contact #87A on relay #1 is opened killing the signal to your LEDs.

It's late and someone may see a flaw in my thinking, but it should work.
I'd have to draw it all out.

Going to try to go back to sleep now