headlights help

[lonewolf73]

Hi all
I bought a hid headlights low beam haven't bought the high beams yet, but the hid that I got are plug an play that plug into your old wiring but I wanted to put in a relay so I got the plug an I was wandering since it has 3 wires coming out of it how do I connect it to the relay I know 1 is ground. the other 2 are they both hot or is just 1 hot?
I have a 1973 charger
thanx for the help an info

 

[Photon440]

While a relay is always a good idea, hid headlights actually draw less amperage so you can run the stock wiring with no problem.

You have three prongs because the original low beam lights have two filaments, one for low beam and the other for high beam. If you look at a stock headlight in a four light system, the beam pattern and focus for the low beam bulb changes when you go to high beams, it's not just the extra set of lights kicking in.

Simple enough to get your multimeter out and see which wire feeds the low beam power.

Also, hid high beams isn't a good idea. They don't like being turned on and off all the time like high beams often are. New cars with factory hid headlamps don't use hid high beams. They either have additional halogen for high beam, or if single bulbs, they use bi-xenon set-ups that actually change the beam pattern with a mechanical shutter while the light itself stays on at the same brightness.

-=Photon440=-