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09-25-2014, 04:28 AM
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#1 |
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Registered User
Join Date: Apr 2003
Location: Central florida
Posts: 3,223
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mystery bulb and wire - where does it go
so while trying to tidy up the wiring on the truck, ive came across this bulb and wire behind the instrument panel, ive tried tracing the wire and it goes into the big bundle of wires in the loom, I also tried looking on the wiring schematic that's pinned on this site, but I for the life of me cannot figure what it is used for and how to test to see if it turns off and on as it should from factory.
the wire looks to be gray/silver and the black you see on there is overspray from previous owner. my first thought was that it might goto the instrument cluster as a warning bulb, but all the holes avail are already taken and non of them correspond to that type of socket holder on the bulb. 
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09-25-2014, 05:05 AM
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#2 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: mystery bulb and wire - where does it go
It looks like the AC/heater bulb to me. They are single wire with that housing to pop in to the hole in the back side.
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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09-25-2014, 06:11 AM
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#3 | |
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Registered User
Join Date: Jun 2014
Location: Glendale, Arizna
Posts: 1,642
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Re: mystery bulb and wire - where does it go
Quote:
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09-25-2014, 07:22 AM
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#4 |
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Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,559
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Re: mystery bulb and wire - where does it go
Yup! Mine has two-one on each side of the heater-A/C controller.
__________________
70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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09-25-2014, 07:37 AM
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#5 |
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Registered User
Join Date: Feb 2012
Location: Smyrna TN
Posts: 1,153
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Re: mystery bulb and wire - where does it go
Nope, I've got the same bulb behind my cluster along with the two for the a/c control. I've not figured out what its for either. Mine is 71 with full gage cluster.
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09-25-2014, 10:27 AM
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#6 |
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Registered User
 
Join Date: Nov 2010
Location: Big Bear Lake, CA.
Posts: 291
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Re: mystery bulb and wire - where does it go
Into the stock am radio?
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09-25-2014, 10:41 AM
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#7 | |
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Moderator
 
Join Date: May 2007
Location: Southern Cal
Posts: 20,001
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Re: mystery bulb and wire - where does it go
Quote:
__________________
1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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09-25-2014, 02:22 PM
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#8 |
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Registered User
Join Date: Apr 2003
Location: Central florida
Posts: 3,223
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Re: mystery bulb and wire - where does it go
Guess it's time to get my 6'5 325lb self under the dash again and see where to fit it in, the previous owners did remove the AC system to shave the firewall but did leave the control panel installed.
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09-26-2014, 03:40 AM
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#9 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: mystery bulb and wire - where does it go
I have never had a stock radio in my 71 so I'm not going to say it isn't for the radio. I will say it could be that if in fact the AC control panel has the 2 lights in it and this is a extra one.
I haven't ever seen any bulbs like that for the stock dashes that I've ever worked on.
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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