The dome light, glovebox light, and cigarette lighter on my 1979 el camino have no power, and I believe they run off the same fuse. The lettering on the fuse box is gone, I don't have a manual and I can't...
Why not check every fuse in the fuse panel in 5 minutes or less, without pulling a single fuse out to inspect it? You can do it with a cheap test light, and even tell if the fuse panel is powered, too.
All fuses have two little test ports on the plastic top of the fuse, one at each end of the fuse. They can be used to tell if a fuse is good or blown. The little ports are open to the metal strip inside the fuse, the strip that snaps apart when the fuse blows.
Hook up a test light by clipping the ground lead to a metal bracket or a bolt or screw by the fuse panel. Turn the key to on, not start. Now every fuse in the fuse panel should be powered. Pick a fuse and touch the test light probe into the little test port on the fuse, either side. Test light should light. If not, either the ground clip for tester is not secure, or the fuse panel is not getting power to that fuse as it should with the key on, or you just happened to pick a blown fuse. Move tester probe to other end of fuse and see if power there. Keep on until your tester lights up when touching the little port on the fuse.
Got it? Okay, now with every fuse, you need to touch tester to both ends of fuse to verify a good fuse. Key is on, all fuses are powered up, so even a blown fuse will light the tester on one end of fuse. A good fuse will light the tester on both ends of the fuse-the metal strip inside has not snapped apart-good fuse.
You can use this method to check every fuse on a car without pulling the fuse out to check. And you will find out if any part of the panel is not powered up. Test lights are very handy. You could check every fuse quicker than it took me to explain this!
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