C5 Dash Warning Lamp Replacement / Type?
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From: Beverly Hills (Pine Ridge) Florida
C5 Dash Warning Lamp Replacement / Type?
Anybody know what bulbs are used for the various dash warnings (specifically the Brake light)?
Thanks,
Plasticman
Thanks,
Plasticman
Thread Starter
Race Director
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From: Beverly Hills (Pine Ridge) Florida
Nope, I figure the warning lamps must actually be LEDs.
I just measured the current draw, and it only takes 10ma of current for it to light.
Wish they would show that in the Service Manual (would of saved me a lot of effort)!
Thanks,
Plasticman
I just measured the current draw, and it only takes 10ma of current for it to light.
Wish they would show that in the Service Manual (would of saved me a lot of effort)!
Thanks,
Plasticman
Le Mans Master
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From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
No they are incandescent bulbs. I've honestly never needed to research replacements for them yet;
I believe they are a type #74 T5 Twist Lock base, check the following link for a suitable size. It has two, the 74 and a type #24 T6.5;
http://autolumination.com/74.htm
Thanx for the kudo Dave, but I think you know as much as I do!!
I believe they are a type #74 T5 Twist Lock base, check the following link for a suitable size. It has two, the 74 and a type #24 T6.5;
http://autolumination.com/74.htm
Thanx for the kudo Dave, but I think you know as much as I do!!
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
No they are incandescent bulbs. I've honestly never needed to research replacements for them yet;
I believe they are a type #74 T5 Twist Lock base, check the following link for a suitable size. It has two, the 74 and a type #24 T6.5;
http://autolumination.com/74.htm
Thanx for the kudo Dave, but I think you know as much as I do!!
I believe they are a type #74 T5 Twist Lock base, check the following link for a suitable size. It has two, the 74 and a type #24 T6.5;
http://autolumination.com/74.htm
Thanx for the kudo Dave, but I think you know as much as I do!!
It does appear that there are definitely 2 different sized bulbs being used and they definitely are of the "twist-lock" design. I wish the shop manual was more forthcoming on the replacement bulb info. So far I can't find anything on these.
We need to see the bulbs out of the panel and check them for the SAE-type standard part numbers. Once you have the actual number, you can usually go to a variety of sources for replacement.
Le Mans Master
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From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
Well, tell ya what I have the bulbs out of that IPC, it's a spare one I bought to experiment on. I'll see if they are marked or at the very least get em measured and see what I can find in the way of a suitable replacement for them... I'll post back up with what I find out.
Tim
Tim
Excellent photo. If it were closer in, you make out all the markings of the various bulb functions, but in that pic I can only make out "CE" (check engine), "ABS", and I think it's "RT" and "LT" (right turn/left turn?). The upper center one has to be "High Beam".
It does appear that there are definitely 2 different sized bulbs being used and they definitely are of the "twist-lock" design. I wish the shop manual was more forthcoming on the replacement bulb info. So far I can't find anything on these.
We need to see the bulbs out of the panel and check them for the SAE-type standard part numbers. Once you have the actual number, you can usually go to a variety of sources for replacement.
It does appear that there are definitely 2 different sized bulbs being used and they definitely are of the "twist-lock" design. I wish the shop manual was more forthcoming on the replacement bulb info. So far I can't find anything on these.
We need to see the bulbs out of the panel and check them for the SAE-type standard part numbers. Once you have the actual number, you can usually go to a variety of sources for replacement.
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Well, tell ya what I have the bulbs out of that IPC, it's a spare one I bought to experiment on. I'll see if they are marked or at the very least get em measured and see what I can find in the way of a suitable replacement for them... I'll post back up with what I find out.
Tim
Tim
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From: Beverly Hills (Pine Ridge) Florida
Interesting, but a # 74 incandescent is rated .1A (@ 14V), but I only saw .01A (which is what a LED would draw).
The mystery deepens.
Thanks,
Plasticman
The mystery deepens.
Thanks,
Plasticman
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From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
OK I blew the dust off the ole Sony Alpha and took some pics for us to try and figure this out. First some close ups of the flexable PCB showing the annotations that LoneStar was interested in;
One point of interest here is the markings "T5", which seems to support my original thought as to the size of the bulb. Also the openings labled "S" (spare?) and 14 never had a bulb in them...
LoneStar was also correct in that there are two different sized bulbs/bases, the smaller one I'm not familiar with at all, and working form memory I don't believe they were in an active slot;
Note the markings on the back of the base, might be nothing more then an internal manufacturers marking but who knows?
And for your added viewing pleasure here is every damn bulb in the interior minus the Radio/HVAC;
Large and small IPC bulbs, Trunk/Traction/DIC, Doors, Dimmer and HUD respectively.
Tim
One point of interest here is the markings "T5", which seems to support my original thought as to the size of the bulb. Also the openings labled "S" (spare?) and 14 never had a bulb in them...
LoneStar was also correct in that there are two different sized bulbs/bases, the smaller one I'm not familiar with at all, and working form memory I don't believe they were in an active slot;
Note the markings on the back of the base, might be nothing more then an internal manufacturers marking but who knows?
And for your added viewing pleasure here is every damn bulb in the interior minus the Radio/HVAC;
Large and small IPC bulbs, Trunk/Traction/DIC, Doors, Dimmer and HUD respectively.
Tim
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St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Ah, looks like these pc markings indicate:
SE = "Security", CG = "Check Gages", SB = "Seat Belt" (person in seatbelt icon), AB = Unused (maybe "Air Bag"?), 14 = "1 to 4 SHIFT" and BK = "Brake"
In this pic looks like:
ABS = "ABS" (self-explanatory), TR = "Traction Control" (skidding car icon), the upper two with "T5" next to them, appear to be the "MPH" (lower) and "km/h" (upper) indicators, CE = "Check Engine" (word "CHECK" beneath engine icon) and S = unused (possibly used on that same printed circuit in other GM vehicles)
BTW, the "14" (1 to 4 Shift) though maybe empty on your car, HAS had something in the socket as I can see the indentations in the copper strip.
I agree with you that the "T5" marking is no fluke and probably indicates the category (or "family") of bulb used there. I'm thinking the "larger" of the two IPC bulbs is/are a PC168 and commonly available through a wide variety of sources. The PC168 would be the complete assembly (base + bulb) and a 168 bulb will plug right in if you wanted to just replace the bulb only. BTW, if memory serves, the 168 and the 194 bulbs are of the same family (dimension-wise) and will physically inter-change, but that definitely does NOT mean people SHOULD inter-change bulbs as a 194 is brighter and therefore draws more current and generates more heat too. Bottom line is: always consider what the bulb is used for and where it's located before just slapping something in just because "it fits". Sometimes you can get away with that and sometimes not.
And for your added viewing pleasure here is every damn bulb in the interior minus the Radio/HVAC;
Large and small IPC bulbs, Trunk/Traction/DIC, Doors, Dimmer and HUD respectively.
Tim
Thanks
Thread Starter
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From: Beverly Hills (Pine Ridge) Florida
Put an ammeter is series with the feed (tan/white) from the parking brake switch, and grounded the negative lead.
Used both a digital VOM (read 9.8ma on the 20M scale) and an analog meter (read about 10 on the 50ma scale).
Lamp lighted properly both times.
Plasticman
Used both a digital VOM (read 9.8ma on the 20M scale) and an analog meter (read about 10 on the 50ma scale).
Lamp lighted properly both times.
Plasticman
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From: Beverly Hills (Pine Ridge) Florida
Should give a little background as to what I have done:
I remote mounted an Escort Radar Detector (Passport 8500 X50) forward under the bumper cover, and ran a cable back to the cockpit (for the Escort remote control / power connections).
Put in a small speaker, and all works just fine. However, the Escort remote's LED are not mounted where I can see them readily, and the speaker is OK when the top is up,
but gets harder to hear with the top down. I wanted to use the "Brake". light on the dash as an added "alarm" feature (as in "Brake you dummy, radar is watching you!").
Having added a small switching circuit to the existing wiring, I now have that feature as well.
I just needed to know what the lamp draw was, in order to design the switching circuit (hence my original question, but once I measured it, the design was a "done deal").
Plasticman
I remote mounted an Escort Radar Detector (Passport 8500 X50) forward under the bumper cover, and ran a cable back to the cockpit (for the Escort remote control / power connections).
Put in a small speaker, and all works just fine. However, the Escort remote's LED are not mounted where I can see them readily, and the speaker is OK when the top is up,
but gets harder to hear with the top down. I wanted to use the "Brake". light on the dash as an added "alarm" feature (as in "Brake you dummy, radar is watching you!").
Having added a small switching circuit to the existing wiring, I now have that feature as well.
I just needed to know what the lamp draw was, in order to design the switching circuit (hence my original question, but once I measured it, the design was a "done deal").
Plasticman
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
BTW, after doing a bit more cursory research, it appears that that (brake light) is likely to be a #74 bulb.
UPDATE:
After looking into some of the IPC bulbs a bit more, I was able to determine the largest of the "twist-out" bulb assemblies are using a # 161 bulb and I was able to confirm that the smaller of the removable bulb assemblies do indeed use a # 74 bulb. Both of these two can be changed by simply grasping the bulb and pulling it out of the small twist-lock socket. I came across a third bulb assembly that closely resembles a #74.
HTH
UPDATE:
After looking into some of the IPC bulbs a bit more, I was able to determine the largest of the "twist-out" bulb assemblies are using a # 161 bulb and I was able to confirm that the smaller of the removable bulb assemblies do indeed use a # 74 bulb. Both of these two can be changed by simply grasping the bulb and pulling it out of the small twist-lock socket. I came across a third bulb assembly that closely resembles a #74.
HTH
Last edited by LoneStarFRC; Feb 21, 2009 at 12:38 AM.
Le Mans Master
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From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
I would check a site that sells LED bulbs in industry standard bases like autolumination.com. I seem to remember that on their type 74 page there were twist lock bases with LEDs...
Tim
Tim
