Cargo Light Bulb? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

daddybullfrog · 12-10-2003, 10:14 PM

The cargo light bulb burned out in my '72. When I changed it out, the thing twisted off and I damaged the old bulb. No big deal except taht i cannot identify the bulb. What's strange is the bulb has two contacts on the base and a single element. The socket also has two contacts. Does anyone know why this is? This is a factory cargo light.

*rage'nrat638* · 12-10-2003, 10:19 PM

yup thats the stock gOOfy bulb.....
i got one with the new cargo light i ordered....looked at the parts store they did not have it

i changed it right away before i install it....got one laying here...
i guess i could go look for the number

*rage'nrat638* · 12-10-2003, 10:25 PM

12V32CP DON'T ASK ME

daddybullfrog · 12-10-2003, 10:25 PM

I'd appreciate it greatly! Why does it have two contacts and one filament?

**john** · 12-10-2003, 10:25 PM

The reason for two contacts is they use the orange and white wires from the dome light circuit,and the orange one is hot all the time and the white completes the ground. Other wise you would feed back into your dome light.

daddybullfrog · 12-10-2003, 10:29 PM

That makes sense. Thanks for the info. Merry Christmas from New Mexico!

jhow66 · 12-10-2003, 10:45 PM

#1142

cdowns · 12-11-2003, 12:23 AM

all light bulbs have 2contacts

desertchevy · 12-11-2003, 03:55 PM

I put a 1004 in mine.Two contacts one element

Gene · 12-11-2003, 04:11 PM

Quote:

Originally posted by cdowns
all light bulbs have 2contacts

Not necessarily true, the light bulbs that illuminate the a/c heater controls have only 1 positive contact.

cdowns · 12-11-2003, 04:39 PM

HAH a lightbulb with 1contact !! how is the electrical circuit completed??? there MUST!!!! be a positve and a negative contact for illumination !!!!!!!!!!!! there's no such thing as a light bulb with 1contact go back to basic electricity class !!!!!!!!!!!

Dean · 12-11-2003, 05:37 PM

Isn't the outer case the other contact/ground? I think he meant there is only one hot contact.

Anyone make a brighter light for a cargo light? Like a halogen or something??

tom hand · 12-11-2003, 06:36 PM

The reason it has two contacts on the base and one filiment, is it does not use the brass base for a ground as most bulbs do

Gene · 12-11-2003, 09:03 PM

Quote:

Originally posted by cdowns
HAH a lightbulb with 1contact !! how is the electrical circuit completed??? there MUST!!!! be a positve and a negative contact for illumination !!!!!!!!!!!! there's no such thing as a light bulb with 1contact go back to basic electricity class !!!!!!!!!!!

Last basic electricity class was in high school but I retained some knowledge. So using your logic all lightbulbs have 3 contacts? Geez, don't get your panties in a wad. I guess I should have clarified myself, not all lightbulbs have 2 contacts on the bottom of the bulb

jhow66 · 12-11-2003, 09:03 PM

Check your backup bulb in your truck--1156--1 contact--grounds thru brass. ( last class was in 1954 at UT-go Vols)

cdowns · 12-11-2003, 09:07 PM

duh a ground is a contact

jhow66 · 12-11-2003, 09:11 PM

Right but only one contact on bottom unlike a 1142 which has two on bottom which does not ground thru case. (electricity 101)

Gene · 12-11-2003, 09:13 PM

Duh? My 9 year old argues like that

Some flourescent lightbulbs have 4 contacts.

cdowns · 12-11-2003, 09:40 PM

yes true some light bulbs have more than 2contacts like the mentioned dual filament 1142 that has 2contacts for the filaments and a3rd contact where it grounds thru the case
what's getting confused by those unfamilar with electricity is that i stated A LIGHT BULB MUST HAVE 2CONTACTS and yes it can have more like the 1142 with three or the flouresents or headlights but a light dont work with 1contact NEVER

jhow66 · 12-11-2003, 09:51 PM

1142 has one filament and 2 contacts on bottom. Does not ground thru case. It works like John says. We all know that you have to have a complete circuit to ground. I have wired many street rods and machines from scratch including fuse panel. Was not trying to put you down-just having a little fun.

Gene · 12-11-2003, 10:03 PM

Yeah, Not trying to make you look bad cdowns, I just pointed out something that I saw that seemed incorrect. We're basically saying the same thing but wording it different. BTW I am very familiar with basic electrical properties. I wired my shop and my 71 Chevy and have done many electrical repairs to my home. Even have to wire in proximity switches, photo eyes and numatic solenoids from time to time in my line of work.

12-10-2003, 10:19 PM	#2
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	yup thats the stock gOOfy bulb..... i got one with the new cargo light i ordered....looked at the parts store they did not have it i changed it right away before i install it....got one laying here... i guess i could go look for the number Last edited by rage'nrat638; 12-11-2003 at 10:38 PM.

12-10-2003, 10:25 PM	#4
daddybullfrog Active Member Join Date: Dec 2000 Location: Bosque Farms, NM, USA Posts: 184	I'd appreciate it greatly! Why does it have two contacts and one filament? __________________ '67 C-10 short stepside '72 K-10 Cheyenne Super under construction

12-10-2003, 10:25 PM	#5
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	The reason for two contacts is they use the orange and white wires from the dome light circuit,and the orange one is hot all the time and the white completes the ground. Other wise you would feed back into your dome light. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

12-10-2003, 10:29 PM	#6
daddybullfrog Active Member Join Date: Dec 2000 Location: Bosque Farms, NM, USA Posts: 184	That makes sense. Thanks for the info. Merry Christmas from New Mexico! __________________ '67 C-10 short stepside '72 K-10 Cheyenne Super under construction

12-10-2003, 10:45 PM	#7
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	#1142 __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-10-2003, 10:14 PM	#1
daddybullfrog Active Member Join Date: Dec 2000 Location: Bosque Farms, NM, USA Posts: 184	Cargo Light Bulb? The cargo light bulb burned out in my '72. When I changed it out, the thing twisted off and I damaged the old bulb. No big deal except taht i cannot identify the bulb. What's strange is the bulb has two contacts on the base and a single element. The socket also has two contacts. Does anyone know why this is? This is a factory cargo light. __________________ '67 C-10 short stepside '72 K-10 Cheyenne Super under construction

12-11-2003, 12:23 AM	#8
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	all light bulbs have 2contacts __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

12-11-2003, 03:55 PM	#9
desertchevy Registered User Join Date: Dec 2003 Location: Fairbanks Alaska Posts: 222	I put a 1004 in mine.Two contacts one element __________________ 2006 Dodge Quad Cab 4X4 2001 Chevy Impala 2006 Corvette 2009 Fusion 1964 Toyota Landcruiser FJ45 Wagon

12-11-2003, 04:39 PM	#11
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	HAH a lightbulb with 1contact !! how is the electrical circuit completed??? there MUST!!!! be a positve and a negative contact for illumination !!!!!!!!!!!! there's no such thing as a light bulb with 1contact go back to basic electricity class !!!!!!!!!!! __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

12-11-2003, 05:37 PM	#12
Dean Senior Member Join Date: Jan 2000 Location: Cincinnati, Ohio Posts: 1,492	Isn't the outer case the other contact/ground? I think he meant there is only one hot contact. Anyone make a brighter light for a cargo light? Like a halogen or something??

12-11-2003, 06:36 PM	#13
tom hand CCRider Join Date: Feb 2000 Location: Olive Branch,MS,USA Posts: 2,232	The reason it has two contacts on the base and one filiment, is it does not use the brass base for a ground as most bulbs do __________________ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS

12-11-2003, 09:03 PM	#15
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Check your backup bulb in your truck--1156--1 contact--grounds thru brass. ( last class was in 1954 at UT-go Vols) __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-11-2003, 09:07 PM	#16
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	duh a ground is a contact

12-11-2003, 09:11 PM	#17
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Right but only one contact on bottom unlike a 1142 which has two on bottom which does not ground thru case. (electricity 101) __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-11-2003, 09:13 PM	#18
Gene Registered User Join Date: Aug 2002 Location: Muskogee, Oklahoma Posts: 2,914	Duh? My 9 year old argues like that Some flourescent lightbulbs have 4 contacts. __________________ 1971 SWB 4X4 Build BOARD MEMBER #5448 BOOMER SOONER!!!!



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12-11-2003, 09:40 PM	#19
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	yes true some light bulbs have more than 2contacts like the mentioned dual filament 1142 that has 2contacts for the filaments and a3rd contact where it grounds thru the case what's getting confused by those unfamilar with electricity is that i stated A LIGHT BULB MUST HAVE 2CONTACTS and yes it can have more like the 1142 with three or the flouresents or headlights but a light dont work with 1contact NEVER __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

12-11-2003, 09:51 PM	#20
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	1142 has one filament and 2 contacts on bottom. Does not ground thru case. It works like John says. We all know that you have to have a complete circuit to ground. I have wired many street rods and machines from scratch including fuse panel. Was not trying to put you down-just having a little fun. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-11-2003, 10:03 PM	#21
Gene Registered User Join Date: Aug 2002 Location: Muskogee, Oklahoma Posts: 2,914	Yeah, Not trying to make you look bad cdowns, I just pointed out something that I saw that seemed incorrect. We're basically saying the same thing but wording it different. BTW I am very familiar with basic electrical properties. I wired my shop and my 71 Chevy and have done many electrical repairs to my home. Even have to wire in proximity switches, photo eyes and numatic solenoids from time to time in my line of work. __________________ 1971 SWB 4X4 Build BOARD MEMBER #5448 BOOMER SOONER!!!!

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