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2006 STS 4 V8 White Diamond Pearl 1SG
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59 Posts
Discussion Starter · #1 ·
I have one of the small bulbs out and was wondering do I need to remove the whole assembly to change just this one bulb?
 

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I have one of the small bulbs out and was wondering do I need to remove the whole assembly to change just this one bulb?
Pull the front bumper and grill off (not an easy task). If you decide to do this yourself remember that the 4 nuts that hold the bumper to the fenders are tighteners that hold sliders. these sliders will slide forward to a slot that will allow the bumper assy to come off... after you remove all of the plastic clips that hold the fairings onto the frame. This will give you access to the headlight capsule.
 

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08 STS V, had 06 V6 STS
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427 Posts
LED upgrade while your in there? My small bulbs go out and if I tap on the light, they come back on... I was wondering how to get them out as well. Glad you asked.
 

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LED upgrade while your in there? My small bulbs go out and if I tap on the light, they come back on... I was wondering how to get them out as well. Glad you asked.
That is so wild!!! The little light on the pass side on mine does the same thing. It goes out and when I notice I give the side of the capsule a good rap and it comes back on!
 

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08 STS V, had 06 V6 STS
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427 Posts
I try to do it when nobody's looking...:cool2: I hate when I have a bulb out, but I feel pretty stupid when I have to smack my Caddy to get the light to come on :helpless: Mine started as just the passenger side but I've noticed the driver's side doing it now as well... :hmm:
 

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01 catera, 08 sts
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73 Posts
id say if its only the small light dont take off the bumper, just unscrew the fuse box, and disconnect it. and that should give you enough room to the headlight side door just unscrew that, pull off the door and twist out the small bulb socket. just letting you know its a tight fit in there but it beats having to take off the bumper
 

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2003 CTS "Ebony Maria" 2005 Cadillac STS "Grace"
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6,414 Posts
i might be wrong here because i have never done this on my STS, but on the CTS guys turn there wheels all the way to one side where they can get more room in there, pop the fender liner off and then you have plenty of room to swap that bulb out...once again, i have never done this to my STS yet, but it seems legit to me and easy enough as i have done this on the CTS
 

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2008 STS-V and 2003 Escalade, 2005 STS4 1sg (sold)
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36 Posts
My passenger side fog light wasn't working so I just went out there and tried tapping on it and it came on!! But where is the best place to get the small lights in the headlamp...i want led's
 

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08 STS-4 N* 1SG, 08 DTS Luxury II, 04 Bonneville GXP N*
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3,215 Posts
i might be wrong here because i have never done this on my STS, but on the CTS guys turn there wheels all the way to one side where they can get more room in there, pop the fender liner off and then you have plenty of room to swap that bulb out...once again, i have never done this to my STS yet, but it seems legit to me and easy enough as i have done this on the CTS
Are you talking about the signal light on the side of the fender just behind the wheel? If so, what you suggest will work. The lamp in this thread is actually inside the headlamp assembly. To gain access you need to remove an access panel on the assembly. I've never done it either, but looking at the diagrams and photos, I can't see being able to use the method you're suggesting for the bulb in question. Again, no first hand experience with this one so it's just an opinion.
 

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08 STS V, had 06 V6 STS
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427 Posts
So, just what is the point of this little bulb anyway?
I believe it's just a "parking" light...
Does anyone have any ideas as to why this is happening? Maybe a bad relay or something... The WIERD thing about mine is, when the little bulb on the driverside started doing this as well, I found that giving it a tap would make both passenger and driver lights come back on WTH???? That's what's making me believe there's more to it than just a loose bulb.
 

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08 STS-4 N* 1SG, 08 DTS Luxury II, 04 Bonneville GXP N*
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I've seen many, many bulbs over the years that react this way. Depending on how the element fractures (one location only), tapping it can resestablish the connection temporarily. It still has to be replaced because... well, it's in essence "burned out". If the element is broken in two or more places you'll never be able to get it to light up again. Hitting the bulb always used to be the trick when the old sealed beam headlamps went out until you could get a replacement.

Most bulbs have a similar life expectancy so when one burns out, the one on the opposite side often isn't far behind.
 

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2014 XTS V-Sport Platinum
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2,230 Posts
Okay. Then i have to assume both of mine are burned out because no matter what position the headlight switch is in, the lights never turn on. Are they supposed to turn on in the parking light position? I noticed the amber turn signals don't in that position.
 

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2014 XTS V-Sport Platinum
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2,230 Posts
Thanks! My next purchase should be the Cadillac shop manuals. They sure are spendy! I see the discs on eBay but prefer paper manuals. Especially since removing the front facsia is involved.
 
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