Rear dome light very dim

[mitchC]

Looking for wiring diagram for 06 or an answer to fix my rear cab dome light.
It runs but barely suspect broken wire strands some where. I’ve replaced both rear door harnesses.
With success on my speakers. But not sure where to begin on the dome light. thanks

 

[mpaulson]

I assume you’ve replaced the bulb, right? They can and do go dim before they break the element inside of them.

 

[mitchC]

I assume you’ve replaced the bulb, right? They can and do go dim before they break the element inside of them.

Yes that was the first thing I tried.

 

[mpaulson]

Maybe pop the fixture out and run a loose wire to it from the battery and apply 12volts directly too it to see if it’s brighter. Could be a bad ground as well. If the direct 12 volts supply fixes it then that’s your clue. If not, run a jumper ground to see if that makes it bright.

 

[mitchC]

Maybe pop the fixture out and run a loose wire to it from the battery and apply 12volts directly too it to see if it’s brighter. Could be a bad ground as well. If the direct 12 volts supply fixes it then that’s your clue. If not, run a jumper ground to see if that makes it bright.

Thanks I’ll give that a try

 

[Ozymandias]

Insert an LED Bulb, that's what I did with the same problem. Way easier then run a new cable across the Truck.

 

[mitchC]

I did that too I barely illuminates. Very dim as well.

 

[Ozymandias]

I did that too I barely illuminates. Very dim as well.

Au, then there is a real problem, they need very few power.
How much voltage do you measure at the bulb of the dome light when it us switched On?

 

[PWong]

http://www.rambodybuilder.com/2006/docs/wd/dr/wiringdiagrams/8w44interiorlighting.pdf

 

[mitchC]

Thank you for the wiring diagram.
I found the the problem in the switch at the fixture it’s a 3 pin switch and one leg has been real hot and burned out the connection. Now if I can find a replacement part it seems it was used on a lot of different vehicles just would like to have a new one as opposed to a used one with possibly the same issue. Fixture # 1BC77TRMAA REV A thanks for the all the input guys.

 

[Ozymandias]

I just checked Ebay, there are virtually hundreds of these Lights, new and used for almost no money, 20$.