Re: Schematic questions
Posted by HH56 On 2022/10/12 17:34:54
The trunk lights have either a mercury switch or a rolling ball switch at the base of the bulb. Not quite sure when they made the change but think maybe around 51. When the lid is raised the switch completes the contact. The factory switch is in a small glass cartridge and was not a factory available part for replacement as far as I know.
Apparently something causes some kind of coating to cover the contacts to the point they can no longer make a connection. Some have had limited success shaking the **** out of the assy to knock the coating off but that is at best short term, usually not too successful and a lot of work.
I have had luck hiding a modern commercial switch in the lid space above the light. I did a mercury switch because it was easily available but rolling ball switches are out there too. Typically this type switch is used for motion sensing with car burglar alarms.
Here is a photo of the stock mercury switch arrangement posted years ago. This is a 22-23 series housing. Don't remember who posted it but later model assys work the same but are a different shape. Also my 47 assy showing the added switch.
Attach file:
Packard Trunk Light.jpg (95.42 KB)
46-50 trunk light.jpg (110.06 KB)
Apparently something causes some kind of coating to cover the contacts to the point they can no longer make a connection. Some have had limited success shaking the **** out of the assy to knock the coating off but that is at best short term, usually not too successful and a lot of work.
I have had luck hiding a modern commercial switch in the lid space above the light. I did a mercury switch because it was easily available but rolling ball switches are out there too. Typically this type switch is used for motion sensing with car burglar alarms.
Here is a photo of the stock mercury switch arrangement posted years ago. This is a 22-23 series housing. Don't remember who posted it but later model assys work the same but are a different shape. Also my 47 assy showing the added switch.
Attach file:
Packard Trunk Light.jpg (95.42 KB)
46-50 trunk light.jpg (110.06 KB)
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