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dome light help

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Old Jul 2, 2007 | 06:55 PM
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dome light help

nd no difference in potential between the two tabs.In other words they are the same voltage.THe two map lites work fine but not the dome.Any ideas.
Thanks all
 
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Old Jul 2, 2007 | 06:59 PM
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some reason that didnt type rite.
My dome lite does not work.I have 12 volts on both of the brass tabs that hold the bulb.THe two map lites work fine but not the dome
 
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Old Jul 2, 2007 | 08:22 PM
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Are you measuring from each tab to ground or across the two tabs?
 
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Old Jul 4, 2007 | 03:03 PM
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Each tab to ground is 12 volts.Across the two tabs it reads zero volts(no difference of potential)both tabs are 12 volts from the same sourse.
Originally Posted by PupnDuck
Are you measuring from each tab to ground or across the two tabs?
 
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Old Jul 4, 2007 | 03:19 PM
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Take the bulb out and measure again.
 
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Old Jul 4, 2007 | 03:27 PM
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lol.That was with the bulb out
Originally Posted by redford
Take the bulb out and measure again.
 
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Old Jul 4, 2007 | 05:23 PM
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Do the cargo box lamps (the ones on either side of the high mounted brake light) work? They are wired in parallel with the interior light. If they don't, I would suspect that there is a problem with their common ground point and you're reading the 12 volts being fed back on the ground side from the cargo box lights. The ground for all of these lamps is located on the read cab wall, driver's side just below the rear cab window.
 
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Old Jul 4, 2007 | 05:58 PM
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Yes the two map lites work.
Originally Posted by PupnDuck
Do the cargo box lamps (the ones on either side of the high mounted brake light) work? They are wired in parallel with the interior light. If they don't, I would suspect that there is a problem with their common ground point and you're reading the 12 volts being fed back on the ground side from the cargo box lights. The ground for all of these lamps is located on the read cab wall, driver's side just below the rear cab window.
 
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Old Jul 4, 2007 | 06:10 PM
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Originally Posted by dryfly
Yes the two map lites work.
Not the map lights but the two white lights on either side of your high mount brake light on the outside above the rear cab window.
 
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Old Jul 4, 2007 | 06:17 PM
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aha The cargo lights DO NOT work.New truck for me so dont laugh too hard.I asume u turn them on via the dial that controls the panel lights.
And thanks for the help I will look at the ground on the weekend.Thanks again.
 

Last edited by dryfly; Jul 4, 2007 at 06:23 PM. Reason: forgot to say thank you
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Old Jul 4, 2007 | 08:20 PM
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Originally Posted by dryfly
aha The cargo lights DO NOT work.New truck for me so dont laugh too hard.I asume u turn them on via the dial that controls the panel lights.
And thanks for the help I will look at the ground on the weekend.Thanks again.
Sounds like an open ground. What you're reading is the 12 volts backfeeding from the cargo lights. They come on at the same time as the interior light.
 
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Old Apr 4, 2012 | 11:42 PM
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My cargo lights work, but the rear interior dome light doesn't. All fuses are good, and dome light bulb is good too. Any ideas?
 
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Old Oct 17, 2012 | 05:27 PM
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Done light issue

I have the same problem. No dome lights, or cargo lights. I can't find the common ground point. I have a crew cab... Are you talking about a reg cab? Is it still in the same place?


Originally Posted by PupnDuck
Do the cargo box lamps (the ones on either side of the high mounted brake light) work? They are wired in parallel with the interior light. If they don't, I would suspect that there is a problem with their common ground point and you're reading the 12 volts being fed back on the ground side from the cargo box lights. The ground for all of these lamps is located on the read cab wall, driver's side just below the rear cab window.
 
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Old Nov 13, 2012 | 02:27 PM
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I have the same problem with my '97 Crew Cab. I'll be watching this thread with interest when you figure out your problem.

Thanks,

Randy
 
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