Overhead Courtsey Light Only Has Dime Glow - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-07-2005, 08:57 AM
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Overhead Courtsey Light Only Has Dime Glow

Just got my car back from the upholstery shop which included a new headliner. Now my overhead courtsey light doesn't come on at all when the door is opened, neither does the dome light. When I switch the courtsey light switch directly to on, it comes on with a dim glow and the dome light still does not come on at all.

If I recall, these lights are operated by a grounding switch, and the circuit runs to the overhead courtsey light first, then back to the dome light.

Would the dim glow indicate a weak ground or a short??

The courtsey light is in the underneath of a radio box installed in the ceiling. I had a heck of a time stuffing all the wires in the box when I slid the radio into it. That was with no headliner and I could reach around back and help pull the wires into the back of the box. Now that the headliner is in, if I pull the radio, I might not be able push it and the wires back in. The radio works fine.

Thanks,

John

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Old 06-07-2005, 12:13 PM
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Most likely a bad ground issue. Their are two types of interior light set ups. The first has the light hot and the switch providing the ground (two wires). The second has the light grounded and the switch providing the power(one wire). My Ford has the second type and if I don't get a good ground at the light frame it does what yours is doing. If you have only one wire going to the light it's the second type and if mounted on anything other than metal you will have to add a ground wire from the light frame to metal.
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Old 06-07-2005, 12:55 PM
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I would take it back and tell the upholstery shop of your concern.Chances are something just came undone and they will correct the problem.Headliners are easily damaged when removing and may be worth the extra time to let them fix their goof.
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Old 06-07-2005, 03:48 PM
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Ground

Doc here,

Most likely you have the ground type of dome light...

This is wired , ground provided from the switches at the door posts, to the ground side of the lamp, the power wired "HOT AT ALL TIMES" directly to the lamp socket..

The switched side (ground) is usually daisy chained from the first switch in the line..If that becomes broken, you will lose the switched ground to the light from the door posts..The lamp itself, (if it has it's own switch) will usually ground at or near the lamp itself, If they used a lot of glue on the headliner, or the paint is real thick you could lose ground this way..

The Dim Light from the courtesy lamp system, I would assume, because the ground is faulty to the lamp circuit, is trying to find a ground back up through the dim circuit..fixing the grounds should set that right.

Make sure your door post switches are bonded to a good ground (burnish the paint if necessary) and that the ground at the lamp is also bonded well to ground, That should fix the problem.

Doc
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