Cadillac Seville / Cadillac Eldorado Forum Discussion, Confused about headlights in Past Cadillac Vehicle Discussion; I'm confused about headlights.
I have a 2003 STS with the projector type headlights. Are HID and Xenon the same ...
I'm confused about headlights.
I have a 2003 STS with the projector type headlights. Are HID and Xenon the same thing?
Xenon (named for the gas in the lights) is a type of HID (High Intensity Discharge) lighting system. So yes, they are the same.
Originally Posted by SMDBIOS
Is there such a thing as projector type headlights that are not HID or Xenon? If so are they Halogen? Do they also need balists to operate?
Yes there are.
All the new Cadillac designs use a projector type lamp now whether you have the halogen or xenon option. Projectors are nothing new, but finally gaining the popularity the technology deserves. BMW has used non-xenon projectors in many cars since the late eighties, for example.
Originally Posted by SMDBIOS
Did any late model STS's come with non HID or Xenon headlights?
Xenons were available as lowbeams for a few years before the latest redesign, but I am unsure on the exact year they started exactly (around 2001, I believe).
The latest STS (2005+) uses xenons in it's low and high beams.
Snoop around in the various thread headings and technical archives in here and print out the RPO code list for GM......about 9 or 10 pages. Then, go to the underside of your spare tire cover plate and write down all the 3-digit/letter build codes from 1 of the stickers. (Your paint codes are here, also...) Build a rum and coke and list all the options/packages in your vehicle. HID/halogen lighting will show up here. The "Projector" lenses look like a blurry eyeball, regardless of the bulb inside. Take a terry towel, slide one layer under the whole headlight assembly to protect the painted bumper trim, and remove the two ( 1 long, 1 short) bolts from the headlight assembly and gently move it out from the inner (radiator) side, about 4-5". The push pin retainer at the outer rear of the assembly can be a bear to pop loose the first time.......for now, you don't need to pull the whole assembly. The 9005's, inner bulbs, are the high beams and can be changed in an instant this way......don't touch the glass bulb.....instant POP! when turned on. Carefully slip the rubber boots off the back of the projector housings.....only a 9006 low beam bulb inside means halogen. Wires and ballast parts means HID/Xenon. Look carefully at the rubber boot and make sure you put it back on as it was intended to be.....odds are that it was not installed correctly the first time....a small flat blade screwdriver will tuck the edges of the boot where they belong. Put it all back together with anti-seize on the bolt tips, and build another rum and coke. I've had good luck with GE Nighthawk bulbs, brighter than OEM Sylvania, and 1/3 the cost of PIAA.