Underhood light??
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New User
Joined: Jun 2011
Posts: 24
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Underhood light??
I cannot figure this underhood light out at all! I replaced the bulb ( 912) and it still doesn't work.I checked the bulb socket with a test light and it lights up the test light. But bot the bulb.Any ideas why it still will not work.Thanks.
Elder User
Joined: Jul 2005
Posts: 659
Likes: 2
From: Berthoud, CO
This may sound goofy, but I replaced the bulb and the holder. I ended up putting the holder in upside down, and the light would come on when I shut the hood, instead of coming on when I raised it.....
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
The bulb socket also contains a mercury switch. The mercury flows back and forth to close or open the circuit as you raise and lower the hood. That is why whitesford's bulb would come on when closed and go out when open when it was put in backward.
You can see the light come on as you raise the hood and go out as you close it so it is not on a timer.
You can see the light come on as you raise the hood and go out as you close it so it is not on a timer.
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Senior User
Joined: Sep 2009
Posts: 366
Likes: 0
Yep, its a mercury switch. If the light is on and its a mercury switch it might have a timer somewhere in the system just like the dome. It can be a mercury switch and a timer at the same time.
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Lead Driver
Joined: Feb 2000
Posts: 5,374
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From: Palm Bay, Florida
+2 I slip the bulb out of mine if I'm going to have the hood open for a long period of time.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
I pulled the connector near the firewall and only connect it if I want the light on, which is like never.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
