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Old 04-22-2011, 09:45 AM   #1
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under hood lights don't work

I have 2 lights under the hood on my jeep.
One that is over by the battery that should always be on when the hood opens and the other in the center that has the utility cord so the light can be moved.

when I bought the jeep the main light worked most of the time and if not just needed a few taps.
the utility light always worked.

Now both the lights dont work at all.
Is there something specific I should look for or does it seem like i just have basic bad connections?

because its both lights it makes me think something is going on.
Part of the jeep thing for me is being prepared, and some extra light is a must.

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2001 TJ 4.0L Automatic, D35/30, both hard and soft top, full doors,JKS quicker Disconnects, 31" discoverer ATR, American racing 767 offset 15" wheel. ProComp Genuine steel bumpers front and back. glass pack muffler, Rugged Ridge extended fender flares, 130w KC daylighters, motorcycle light for reverse lights. 86,000k miles (11-7-2012)
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Old 04-22-2011, 11:01 AM   #2
Knows a couple things...

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There is a tilt switch next to the original factory under-hood light that is probably the source of your problem. The tilt switch makes a connection to the light when the hood is lifted. Mine went bad too and caused the same problem. That particular switch never gave any problems when they used liquid mercury to make the connection. Now, since mercury for such uses was banned by the EPA, such switches are mechanical and are no longer very reliable.

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Old 04-22-2011, 11:06 AM   #3
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Mine has always given me headaches so I decided I didn't need to count on it working when I might need it in the field.
Just make sure to carry a good flashlight (or two), which is good practice regardless. The under hood lights aren't bright enough any ways IMO so I wrote them off long ago and don't care to spend time or money on replacing them.
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Old 04-22-2011, 11:08 AM   #4
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If the tilt switch if bad, install a new light with an ON/Off switch that you can control. I have two lights under my hood that are controlled by a manual on off switch. I like it.
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Old 04-22-2011, 11:53 AM   #5
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i might just grab a magnet light with LEDs are stick it to the top of the hood.

I do also carry a few flashlights, i just like to have an over head to keep the general area lit up like when putting on jumper cables and your hands are full.
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2001 TJ 4.0L Automatic, D35/30, both hard and soft top, full doors,JKS quicker Disconnects, 31" discoverer ATR, American racing 767 offset 15" wheel. ProComp Genuine steel bumpers front and back. glass pack muffler, Rugged Ridge extended fender flares, 130w KC daylighters, motorcycle light for reverse lights. 86,000k miles (11-7-2012)
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Old 05-18-2011, 06:51 PM   #6
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Funny you should mention a mercury switch. I just fixed my hood light by using a Dremel tool to clean the contacts on the gravity switch; it works now but for how long..? I was thinking how a mercury switch would be more reliable and found this thread while "googling" for it. I already have a mercury switch for the Alarm system so when the light misbehaves again I may modify the lamp to utilize a mercury switch instead of this dreadfully flawed gravity "bullet" looking switch. I would like to add that I have seen your posts before on the Jeep forum and that I have found them to always be amongst the most informative!

Rgds/Mick

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