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Old Jan 29, 2022 | 09:35 PM
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Default Under hood lighting
What tells the under hood lights to come on when you lift the hood? Yes, I know where the light is and the connectors, but I want to know what makes it turn on and where?
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Old Jan 29, 2022 | 09:49 PM
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There is a mercury switch and a timer.
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Old Jan 29, 2022 | 09:55 PM
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From: Bugs Bunny should'a made a left turn here
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Originally Posted by MyPython
what makes it turn on
Gravity
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Old Jan 30, 2022 | 02:12 AM
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Any idea where?
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Old Jan 30, 2022 | 03:40 AM
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Originally Posted by MyPython
Any idea where?
There is a Mercury switch in the bulb assembly that was mentioned !!
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Old Jan 30, 2022 | 11:24 AM
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Thank you very much. Cheers
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Old Jan 30, 2022 | 11:37 PM
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Not to hijack the thread. Has anyone replaced the underhood light bulb? My googling hasn't given me any good results.
thanks!
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Old Jan 31, 2022 | 12:04 AM
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I rewired mine a long time ago with some spare bolt LEDs I had laying around. Not at all like popping in a bulb but it's pretty bright now






I just ordered a new plastic lense cover, drilled a hole in it and tapped to the positive and negative parts of the switch housing.
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Old Jan 31, 2022 | 12:37 AM
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Originally Posted by C5 Diag
There is a Mercury switch in the bulb assembly that was mentioned !!
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Old Jan 31, 2022 | 03:13 AM
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Originally Posted by cool555
Not to hijack the thread. Has anyone replaced the underhood light bulb? My googling hasn't given me any good results.
thanks!
That is what I was doing. I put in two super bright LED's. It made all the difference in the world.
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Old Jan 31, 2022 | 10:02 AM
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Originally Posted by cool555
Not to hijack the thread. Has anyone replaced the underhood light bulb? My googling hasn't given me any good results.
thanks!
There are plug and play LED options for the stock underhood light. I actually deleted my underhood light to make room for my catch can.
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Old Jan 31, 2022 | 04:18 PM
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Whoa I wasn't expecting that LED mod. I need to replace the underhood light and the visor bulbs.
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Old Jan 31, 2022 | 06:50 PM
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Here's another option utilizing a small led panel.


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Old Feb 1, 2022 | 12:09 AM
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This a slightly more powerful version, although there have been reports of excessive heat.



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Old Feb 2, 2022 | 05:04 AM
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I'm not sure it's really a "mercury" switch, I think those were phased out years earlier due to toxicity concerns, but it is an angle-sensitive switch. I've taken the one apart in my 2002 Silverado and there's actually a metal rocker that causes a sliding contact to move when the angle of the hood is past a certain point. I assume the C5 mechanism is similar.
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Old Feb 2, 2022 | 02:10 PM
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Gotta get an led festoon with 90 degree twisted loop contact ends
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