TSB For Flickering Headlights
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Cadillac DTS Forum - 2006 through 2012 Discussion, TSB For Flickering Headlights in Past Cadillac Vehicle Discussion; Don't know if this will help anyone or not...I hope so... There is a TSB for the flickering headlight problem, ...
  1. #1
    Superjim's Avatar
    Superjim is online now Cadillac Owners Connoisseur
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    TSB For Flickering Headlights

    Don't know if this will help anyone or not...I hope so...

    There is a TSB for the flickering headlight problem, but I have not been able to find the full text of it.

    http://www.allworldauto.com/tsbs/mmy....php?id=263748

    NHTSA Item Number: 10024583
    Service Bulletin #: PIC4812
    Replacement #:
    Vehicle/Equipment Make: CADILLAC
    Vehicle/Eqipment Model: DTS
    Model Year: 2006
    Mfg Component Code: 121000 EXTERIOR LIGHTING:HEADLIGHTS
    Date of Bulletin: 2008-03-01
    Date Added: 2008-04-25
    Summary: HEADLAMP FLICKER - 2006-2007 CADILLAC DTS BUILT BEFORE JUNE 19, 2007. *NJ

    Texas Jim

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    SouthernCountry is offline Cadillac Owners Fanatic
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    Re: TSB For Flickering Headlights

    does it qualify as a recall? would be nice to save me some money if so

  4. #3
    SouthernCountry is offline Cadillac Owners Fanatic
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    Re: TSB For Flickering Headlights

    I jacked this off a XLR forum:
    Look at BOLD

    From the manual:

    High Intensity Discharge (HID) High Beam Headlamps
    Battery positive voltage is applied at all times to the coil and switched side of the high beam relay. Battery positive voltage is also applied at all times through the coil side of the low beam relay to the low beam relay control circuit, to the multifunction headlamp switch. When the multifunction headlamp switch is placed in the high beam position, battery positive voltage is applied through the high beam headlamp dimmer switch signal circuit to the BCM. The BCM then applies a ground to the high beam relay control circuit. This energizes the high beam relay, closing the switched side of the high beam relay, applying battery positive voltage to the Left and Right High Beam Fuses. Battery positive voltage is then applied from the High Beam Fuses through the high beam solenoid switched voltage supply circuit to the high beam solenoid assembly inside of the headlamp. This causes the solenoid to retract a plate partially covering the low beam headlamps and allowing the lamps to illuminate at full brightness.
    Run Up Of The Lamp
    Each ballast requires higher amperage in order to ensure normal startup and run up of the lamp. Run up is the term used to describe the extra power level given to the bulb. The input current during the steady state operation is lower that the start up amperage. After the lamp receives the strike from the starter and the arc is established, the ballast uses its operating voltage in order to provide the run up power needed in order to keep the lamp on. The lamp rapidly increases in intensity from a dim glow to a very high-intensity, bright light called a steady state. Within a few seconds of the arc being established in the bulb, the majority of steady state is complete. 100% of the steady state is completed shortly there after. A high watt power level is necessary in order to bring the lamp to a steady state in such a short period of time. The high watt power level allows the lamp to meet the SAE light vs. time specification.
    When To Change The HID Bulb
    Bulb failure, end of life occurs when the bulb gets old and becomes unstable. The bulb may begin shutting itself off sporadically and unpredictably at first, perhaps only once during a 24-hour period. When the bulb begins shutting itself off occasionally, the ballast will automatically turn the bulb back on again within 0.5 seconds. The ballast will re-strike the bulb so quickly that the bulb may not appear to have shut off. As the bulb ages, the bulb may begin to shut off more frequently, eventually over 30 times per minute. When the bulb begins to shut off more frequently, the ballast receives excessive, repetitive current input . Repetitive and excessive restarts or re-strikes, without time for the ballast to cool down, will permanently damage the ballast. As a safeguard, when repetitive re-strikes are detected, the ballast will not attempt to re-strike the lamp. The ballast then shuts down and the bulb goes out.
    The following symptoms are the noticeable signs of bulb failure:

    * A flickering light, caused in the early stages of bulb failure
    * The lights go out, caused when the ballast detects excessive, repetitive bulb re-strike
    * Color change - the lamp may change to a dim pink glow


    Input power to the ballast must be terminated in order to reset the ballast's fault circuitry. In order to terminate the input power to the ballast, turn the lights off and back on again. Turning the lights off and back on again resets all of the fault circuitry within the ballast until the next occurrence of excessive, repetitive bulb re-strikes. When excessive, repetitive bulb re-strikes occur, replace the starter/arc tube assembly. The ballast will begin the start-up process when the starter/arc tube assembly is replaced. Repeatedly resetting the input power can overheat the internal components and cause permanent damage to the ballast. Allow a few minutes of cool-down time in between reset attempts.
    Bulb failures are often sporadic at first, and difficult to repeat. Technicians can identify bulb failure by observing if the problem gets progressively worse over the next 100 hours of operation.
    Light Color
    White light has a different color rating than regular headlamps. The range of white light that is acceptable is broad when compared to halogens. Therefore, some variation in headlight coloring between the right and left headlamp will be normal. One HID at the end of the normal range may appear considerably different in color from one at the other end of the range. Difference in color is normal. Replace the arc tube only if the arc tube is determined to be at the bulb failure stage.
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  5. #4
    Raygarceau's Avatar
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    Re: TSB For Flickering Headlights

    I recently had this problem left headlight would flicker then go out completely until car was restarted. Took it to the dealer who said couldnt find anything wrong. I went out that night and it did it again. I took a picture of the out headlight with cell phone and emailed it to them. They said bring it in. I decided to turn on the lights on my way over to the dealer. When I pulled in the left light was on but to my and the service writers surprise the right side was out. They decided it was time to start replacing parts. They said cheapest parts first. First they replaced both bulbs, about $600-$700 job if not under warranty they tell me. Good guess on their part , lights haven't flickered or gone out since then. Car is 2007 DTS w/46000 miles Hope this helps people

  6. #5
    MrZoSo is offline Cadillac Owners Fanatic
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    Re: TSB For Flickering Headlights

    Seems it's a common problem. I was having this problem in my 07 DTS also. Dealer could not find a problem. After some bitching on my end, the dealer replaced the ballast's in both lamps Out of "good will".

  7. #6
    fez111 is offline Cadillac Owners Member
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    Re: TSB For Flickering Headlights

    I found complete new 10K light W/ballast units on Ebay for <$60 with free shipping.....

  8. #7
    Nehemiah Chambers's Avatar
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    Re: TSB For Flickering Headlights

    I had the same problem and replaced bulbs with 8k from omnixautosports; haven't had a problem since then.

  9. #8
    chazdts is offline Cadillac Owners Member
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    Re: TSB For Flickering Headlights

    Hello. I just bought an 06 DTS with 31,000 miles on it. I love the car, and everthing is great excep for the flickering headlight issues. I bought from a cadillac dealer who doesn't want to help. I have noticed that now on of the headlights goes out after they flicker for a little while. I have read this forum, and the question that I have is: If I replace the blasts and the bulbs, will this fix the problem? It's dark when I got to work, and dark when I leave work, so this is a constant issue for me.

    Anyone that has replaced the bulbs and balasts, please let me know if this corrected the issue and any info on the products you used would be greatly appreciated.

  10. #9
    BlackRavenDTS's Avatar
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    Re: TSB For Flickering Headlights

    Quote Originally Posted by chazdts View Post
    Hello. I just bought an 06 DTS with 31,000 miles on it. I love the car, and everthing is great excep for the flickering headlight issues. I bought from a cadillac dealer who doesn't want to help. I have noticed that now on of the headlights goes out after they flicker for a little while. I have read this forum, and the question that I have is: If I replace the blasts and the bulbs, will this fix the problem? It's dark when I got to work, and dark when I leave work, so this is a constant issue for me.

    Anyone that has replaced the bulbs and balasts, please let me know if this corrected the issue and any info on the products you used would be greatly appreciated.
    Where do you live? I went to Cadillac Village of Norwood and they replaced both Balasts and they now work perfectly!

    I love my Caddy

  11. #10
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    Re: TSB For Flickering Headlights

    Do you know if the vehicle is still within warranty? I would try another dealership if the one you purchased it from is not willing to help. If you want me to locate one or make an appointment for you, just let me know.
    Breanne
    Cadillac Customer Service

  12. #11
    chazdts is offline Cadillac Owners Member
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    Re: TSB For Flickering Headlights

    Thanks for the replies. I did not buy that waranty, it came with a 90 day power train waranty, the sales rep told me to bring it up, but without buying the waranty, there wasn;t much of a chance it would be covered. I dread the thought of spening a half day at the dealer and not having anything done. I am very mechanical and would have no problem changing out the Balasts and bulbs, I just know better than to buy these part from GM. I am very satified with the dealer that i worked with and the rep was great. Do you know if the balasts and bulbs would be covered under the power train waranty? Seem unlikely. I live in Pittsburgh, PA.

  13. #12
    Clos3ed - Kask3t is offline Cadillac Owners Member
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    Re: TSB For Flickering Headlights

    It's the BULBS! Amazon has them for $55 bucks each. I replaced both myself. It's easy enough to do yourself. I have been dealing with this issue for 6 months now. I took my 06 to the dealer and said their was nothing wrong, then I was driving at night and BOTH head lights shut off. HOLY SHIT that was scary. I purchased and replaced 2 new BALLASTS at first but that was not the problem. I had heard that removing the head light assembly was a real pain. After a couple of hours I finally was able to free the first head light. I did the other side in about 20 minutes. It's really easy to do once you have been there before. Replace your head lights yourself or the dealer will charge you a $1000.00 what a JOKE. Some guy posted pictures on here as to how to remove the head lights. Check it out and save your cash.

  14. #13
    Larringt is offline Cadillac Owners Member
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    Re: TSB For Flickering Headlights

    I'm having the same issue.. Can you tell me what brand headlights you used?

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    Re: TSB For Flickering Headlights

    Quote Originally Posted by chazdts View Post
    Hello. I just bought an 06 DTS with 31,000 miles on it. I love the car, and everthing is great excep for the flickering headlight issues. I bought from a cadillac dealer who doesn't want to help. I have noticed that now on of the headlights goes out after they flicker for a little while. I have read this forum, and the question that I have is: If I replace the blasts and the bulbs, will this fix the problem? It's dark when I got to work, and dark when I leave work, so this is a constant issue for me.

    Anyone that has replaced the bulbs and balasts, please let me know if this corrected the issue and any info on the products you used would be greatly appreciated.
    I just bought an 06 DTS Lux III back in February. The passenger light started flickering right after I bought it. It only actually went out once, where I had to turn the lights off and back on to get the light lit again. I just replaced the bulb (or igniter is the correct term I guess) and it apparently fixed the problem. I did not want to ruin the ballast by waiting too long. I bought a pair of Sylvania d1s from amazon. The new one matched the color of the drivers side very close. I was afraid to buy Philips because of all the Chinese knockoffs out there. From what I read, China does not manufacture Sylvania knockoff. Yet.

  16. #15
    billdaman is offline Cadillac Owners Fanatic
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    Re: TSB For Flickering Headlights

    Quote Originally Posted by Clos3ed - Kask3t View Post
    It's the BULBS! Amazon has them for $55 bucks each.. Some guy posted pictures on here as to how to remove the head lights. Check it out and save your cash.
    http://www.cadillacforums.com/forums...nightmare.html

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