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Glove Box Light Switch

 
Old 02-11-2019, 09:52 AM
  #21  
Frankie the Fink
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Originally Posted by vark_wso View Post
Grounding and circuit completion to light the bulb only occurs when the glove box is opened ... the plastic push button extends by being pushed by the internal metal coil spring. Upon full p/b extension, the spring contacts the (grounded) metal housing of the switch, lighting the bulb. When closed, the door contacts the plastic p/b, the spring is pushed inward off of the metal housing, opening the circuit. The internal spring is what makes & breaks.

Larry -- link below is from AIM for metal car, but it shows the same p/n switch, correct way to install the hook termination before installing the bulb.

http://www.gmpartswiki.com/getpage?pageid=102459
Correct.

The ground is at the metal switch face and the crimped center piece surrounding the plunger through the ďfingersĒ around the switch face contacting the metal glove box liner frame.

Granted, the arrangement is the reverse of the polarity of most bulbsí operation

Last edited by Frankie the Fink; 02-11-2019 at 10:00 AM.
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Old 02-11-2019, 10:09 AM
  #22  
woodsdesign
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Originally Posted by tbarb View Post
Frank,

Maybe I am having a brain fart here but that wire is hot so if the grounding pin from the bulb attaches to it there would be a short, correct..
That is correct. My battery is currently disconnected due to all the work I am doing.
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Old 02-11-2019, 10:19 AM
  #23  
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Originally Posted by woodsdesign View Post
That is correct. My battery is currently disconnected due to all the work I am doing.
That is not correct.
There is no”grounding pin” in this case.
The problem with the unswotched glove box light hot wire is that if it touches ANYTHING it’s a dead short. Z-bar, glove box frame, etc.

Last edited by Frankie the Fink; 02-11-2019 at 01:22 PM.
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Old 02-11-2019, 10:38 AM
  #24  
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Frank,

So you are saying 12v power routes through the brass pin on the bulb base and grounds through the center. I understand the ground path through the glove box frame etc.
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Old 02-11-2019, 10:43 AM
  #25  
Frankie the Fink
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Originally Posted by tbarb View Post
Frank,

So you are saying 12v power routes through the brass pin on the bulb base and grounds through the center. I understand the ground path through the glove box frame etc.
Hot goes to the brass side PIN, the ground is made through the silver contact "nub" on the bulbs bottom which is insulated from the sides; again - opposite most arrangements...

This is why the bulb's bottom is facing outboard and towards the plunger...bulbs are not directional...the filament does not care which way current flows.

Last edited by Frankie the Fink; 02-11-2019 at 10:46 AM.
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Old 02-11-2019, 11:11 AM
  #26  
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OK - I am so **** that I still have my crappy repro switch in pieces so let me field strip this for once and forever:

Glove box door closed...spring captured on plastic rod is disconnected from grounding to the switch face plate

Glove box door open...spring rides plastic plunger forward to contact grounded face plate via the crimped in metal ring around the plunger

This is why the repros are junk. The center metal ring around the plunger will have the crimp let go and ride forward on the plastic plunger preventing a ground for the bulb to light.
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Old 02-11-2019, 11:31 AM
  #27  
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Thanks Frank, that answers my question.

Can you also take apart one of your original horns and show me how it works. :-)
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Old 02-11-2019, 12:33 PM
  #28  
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Originally Posted by tbarb View Post
Thanks Frank, that answers my question.

Can you also take apart one of your original horns and show me how it works. :-)
That would be a NO!
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Old 02-11-2019, 01:18 PM
  #29  
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Originally Posted by Frankie the Fink View Post
That is the right connector - a small piece of hellish design as it is both an electrical connector and configured to physically hold the bulb in by a side pin at the same time.

Its fragile and hokey and once I get one installed and working I do NOT touch it again...which is why I put a bullet connector on the orange glove box light wire (male end coming off the light switch) so I can just unplug the wire when R&Ring the glove box.....
Yep, that repro switch is a mess The whole thing fell apart in my hand as I was trying to install it. Itís one of those parts where all you have to do is look at it and you know itís junk.

Steve
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Old 02-12-2019, 02:26 PM
  #30  
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Bought a repro several months ago. Fell apart trying to install it. Finally found a super good used original and, made the wire mods and haven't looked back since. This is the one item you should run away from the CHINA ones...total junk.
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