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New Headlight assembly - have questions

632 Views 7 Replies 3 Participants Last post by  Calebgeyer
Hello everyone, this is my first time posting here so I apologize if I’m not in the right place

A while back I purchased a set of new headlight assemblies for my 2005 Escalade EXT.

The product said that I just needed to transfer over the HID bulb and ballast.

where is the ballast located and should the battery be disconnected when transferring it over to the new housing?

A separate issue that came up also the other day was that I noticed my nighttime headlight is out. This is the HID bulb . Since I’m replacing the entire assembly and need to transfer over the bulb and ballast how do I find out if the ballast is bad or if the HID bulb had burned out? The daytime running lights work, the high beams work but just not the night time bulb.

below is a link to the headlight

AmeriLite for 2003-2006 Cadillac Escalade HID Model Xtreme LED Halo Ring Black Projector Replacment Headlights Set - Passenger and Driver Side
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The ballast is external to the housing. It's a little gray piece clipped in by the radiator with a wire running from it to the housing. you wont have to transfer it over, just unplug the old and plug in the new. as far as having a bulb out, start by checking the fuses. there are two pairs for the low beam/hid headlights: one labeled low beam headlights, the other labeled HID. Both of these have to be good for the headlights to work. If all the fuses are good, check the bulb next. You'll have to take the bulbs out of the existing housings to transfer them over anyway. I try to avoid doing this as much as I can because it is a pain to do and I always feel like I am going to break the bulb. (Depending on how much you are willing to spend, it might be worth picking up a new set of bulbs anyway so that you wont have to ever change them again for the next 20 years or so.) The HID bulb is coming out of a small metal box that plugs in to one of the wires inside the housing. there is a little metal spring clip holding this assembly into the socket. Release the clip and very carefully fenagle the bulb assembly from the socket. Sometimes it is easier to unplug it first, sometimes it is easier to unplug it after, but it is never easy. Once you have the new housing plugged in, move the "good" bulb to the "bad" side. If it turns on, then you most likely have a bad bulb. you can confirm this by moving the bad bulb to the good side, and it should not come on. If the good bulb does not come on when on the bad side and the bad bulb does turn on on the good side, then you most likely have a bad ballast.
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Once you get the housing out and in the open you'll see the connections in question. It's really a pretty straightforward process once you get eyes on it. I'm sure it wouldn't be a bad idea to disconnect the battery if you wanted to, but I haven't in the past and never had any issues.
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