Wiring question for demon eyes and led strips

**zx7r4u2nv** · 03-19-2011

I have finished building my new projector headlights and have a little wiring problem.

I have led's in the projectors for the demon eye look and led strips on the outer edge.

I want them both to turn on when i turn on the parking lights( if the switch is on for them). But i want the demon eye led's to turn off when the headlights are turned on( leaving the led strips on). The switch will allow me to kill both if need be.

I was considering using 2 relays. 1st would be a normally open and would trigger on with the parking lights and feed led strips and relay 2. Relay 2 would be a normally closed and would get power from relay 1 output. This would trigger to off from headlight feed and kill demon eye power..

I know this will work but does anyone know of a easier way to do this.

**stealthee** · 03-19-2011

I am thinking you can use a DPDT (double pole double throw) relay to do what you need.

Think of it like a rocker switch for power windows. There are only two wires going to the window motor, so when going up polarity is one way, when going down polarity switches due to how the relay is wired.

If wired right this same type of relay can switch the leds off when the headlights come on.

A snippet from a website describing a DPDT relay

The DPDT relay is the fourth kind of simple switch. The "DP" means that it is double pole, so it switches both sides of the circuit, and the "DT" means that rather than just turning on and off, it switches from one set of wires to another.

Read more: How Does a DPDT Relay Work? | eHow.com http://www.ehow.com/how-does_5233616...#ixzz1H6jzgArd

**zx7r4u2nv** · 03-19-2011

Reddawn figured it out for me. Thanks....

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