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Electrical 3rd Gen Dodge Ram Electrical Problems and Questions.

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Old 11-17-2013, 11:31 PM
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Default 05 Interior light issues

Okay, so I have been searching for an answer for 2.5 hours. My issue is that when it gets cold 40 or lower, the interior dome lights in my truck do not work. After the truck warms up and I have the heat on for a little while one of the maps lights usually will start to work. Most of the time however they remain non-functioning. It does not matter how I try to turn them on the lights will not work. It effects both map lights and the dome light. I have upgraded to LED lights and in the warmer weather they work just fine. All of the fuses are good and the lights have good connections. As I mentioned, when it is warm I have no issues. Any help would be great.
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Old 11-18-2013, 08:38 AM
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Well it is possible for LED's to have a specific operating range.

What comes to mind to verify if its the LED's or anther issue is to find the positive and negitive wire and probe them with a multimeter while the LED's are pluged in. (you may have to rig jumer wires). And make sure the dimmer switch isnt resticting the operation of the light.

I would find a good ground away from the light (dont move it) and probe Positive wire going into light. Should see 12v (roughly) and then move the red led (dont move ground) to the ground. Should see 0v. Now place red lead on the positive wire and black lead on the ground you just checked and you should see source reading from orginal test

Do this when cold, and then when warm as you can get it. The whole test takes literally 30 seconds each.

Like i said before it may be the led's that were used and they are highly suspect
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Old 11-27-2013, 11:38 PM
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or put the stock bulbs in and if they work you know it was the op range of the leds
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