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Old 07-25-2008, 03:55 PM   #1
70ChevyCST
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Extra bulb hanging under dash by heater controls

Hi guys, I've been under the dash on my 70 Chevy CST-10 on and off for the past few weeks replacing windshield washer pump, windshield wiper motor, stereo and I noticed an extra bulb...(lights up when I ground it) on the same gray wire as the bulb for the heater controls. The wire is about about 5" longer than the heater control bulb but I cannot figure out where it went or where it might go. It couldn't be for the orig. radio...That had it's own bulb that came out when it did....can't be a glove box light because it needs metal to mount to to light it up. The glovebox is cardboard...plus there's no switch in line to enable/disable it when glove box door would open/close. I also thought that it might be for the ashtray...but there's no hole there for it to fit into either??...Any ideas where it might go?? Can't go anywhere too far away because like I said it's only about 5" longer than the heater controls bulb....Any ideas appreciated..Bob
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Old 07-25-2008, 04:14 PM   #2
CPNE
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Re: Extra bulb hanging under dash by heater controls

IIRC, A/C Heater controls use 2 bulbs; one on each side of the unit.
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Currently on or near the homestead:

67 Chevy SWB 2WD stepside 350/3 on tree (Pat's)
67 GMC SWB 2WD Fleet 402/auto (Brian's under construction)
67 Chevy 3/4 ton 2WD 402/auto (Business Hauler)
67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC)
68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC)
70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC)
71 Chevy SWB stepside (Crushed by tree - parts donor)
72 Chevy 3/4 ton 4WD (Parts donor)
72 Chevy 3/4 ton 4WD Suburban (Parts Donor)
72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC)
81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler)
82 Camaro Z/28 355/Super T-10 (Pat's toy)
93 Caprice 9C1 (Brian's Cop Car)
02 Toyota Camry (Reliable but a souless steel and plastic hulk)
2011 2SS RS Camaro M6 Factory Hurst Shifter

Maybe I need to sell some of this crap

Yet another Bozo with a sawz-all
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Old 07-25-2008, 04:36 PM   #3
Longhorn Man
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Re: Extra bulb hanging under dash by heater controls

yep, it goes on the far side of the heater control.
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Old 07-26-2008, 12:35 AM   #4
AustinScott
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Re: Extra bulb hanging under dash by heater controls

nice! I have the same bulb hanging, and I to was thinking to myself, " wonder what that is for"

Thanks guys, answered my question, without me even asking. These forums ROCK!

Last edited by AustinScott; 07-26-2008 at 12:35 AM.
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Old 07-26-2008, 07:44 AM   #5
GMC Jim
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Re: Extra bulb hanging under dash by heater controls

one should avoid letting their bulbs hang.....(Sorry, just couldn't help it with the comment)..............
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