Underhood lights
Thread Starter
Heel & Toe
Joined: Sep 2007
Posts: 15
Likes: 0
Underhood lights
Dumb question by C4 newbie. What controls the underhood lights? Is there a switch somewhere to turn them on or off? Mine don't come on and I traced the wires down the hood into a connector but see no switch? ???
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
Correct me guys if I'm wrong but I think they have a mercury switch, when the hood is popped they come on. I put a small roll switch (lowes or home depot, lamp type switch) on the wire to turn off when the hood is up for long periods. If they not coming on it could be a fuse.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
They are on a mercury switch 
. You should be able to see a small glass tube with mercury in the tube. When the hood is up the mercury runs to the other side of the tube and makes the electrical connection and turns on the lights. Are you sure the bulbs are good? Some members have installed a inline switch to be able to turn the lights off when the hood is up for long periods.
. You should be able to see a small glass tube with mercury in the tube. When the hood is up the mercury runs to the other side of the tube and makes the electrical connection and turns on the lights. Are you sure the bulbs are good? Some members have installed a inline switch to be able to turn the lights off when the hood is up for long periods.
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
lights controlled by mercury switch, if they are not working its a couple of things:
1. unplugged
2. blown fuze
3. light burned out
The roller switch works great, have them installed on mine, cheap and easy.
1. unplugged
2. blown fuze
3. light burned out
The roller switch works great, have them installed on mine, cheap and easy.
Safety Car
Joined: Jul 2004
Posts: 3,837
Likes: 30
.....there was a post on this w/in the last 5 days or so.......do a search!
