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No Interior light door or auxillary
Posted: Sun Oct 27, 2019 5:58 pm
by Turtle Bite
I have a 2011 9C1 and the interior lights do not work. Neither the door lights or the auxillary map light work, the buttons do not make a difference. I read on here that there is an option 7Y6 dome and courtesy lamps disable, however it sounds like the consensus is the manual map light should still work, AND my car does not have that option.
I started simple, the bulb is good, and I pulled down the maplight and the white 4 pin molex connector was plugged in. I have 12 volts measured at two cavities opposite the retaining clip.
Does anyone have pinout of this connector and which pins are BCM controlled?
Re: No Interior light door or auxillary
Posted: Mon Oct 28, 2019 1:21 am
by smwalker
Pinout listed in this thread:
viewtopic.php?f=21&t=114&hilit=map#p3388
You will see there are two wires that are labeled a similar thing. That is not exactly right. As you will see on the pinout of the the 6 pin connector a page over the labels are a bit more clear.
I broke them down like this:
In the factory 4 pin plug you got 4 wires and what those 4 wires do is basically this:
Pin 1 Ground
Pin 2. Tell BCM to Turn on/Turn off light
Pin 3. Tell the BCM not to turn on the dome light with the doors open.
Pin 4. 12 Volt power for bulbs (turns on rear light as well) from the BCM
Can't quite remember how I came to that conclusion if it was the wiring diagram or the circuit description??
EDIT: I think from the wiring diagram:
- 1ppv dome.png (20.83 KiB) Viewed 7876 times
Re: No Interior light door or auxillary
Posted: Mon Oct 28, 2019 10:18 pm
by Turtle Bite
smwalker wrote: ↑Mon Oct 28, 2019 1:21 am
Pinout listed in this thread:
viewtopic.php?f=21&t=114&hilit=map#p3388
You will see there are two wires that are labeled a similar thing. That is not exactly right. As you will see on the pinout of the the 6 pin connector a page over the labels are a bit more clear.
I broke them down like this:
In the factory 4 pin plug you got 4 wires and what those 4 wires do is basically this:
Pin 1 Ground
Pin 2. Tell BCM to Turn on/Turn off light
Pin 3. Tell the BCM not to turn on the dome light with the doors open.
Pin 4. 12 Volt power for bulbs (turns on rear light as well) from the BCM
Can't quite remember how I came to that conclusion if it was the wiring diagram or the circuit description??
EDIT: I think from the wiring diagram:
1ppv dome.png
Thanks Steve, that diagram is what I needed. I have 12 volts between pins 1 and 2-4. I probed the bulb holder and nothing. Looks like I need to find a new overhead light.
Re: No Interior light door or auxillary
Posted: Tue Oct 29, 2019 8:01 pm
by Turtle Bite
Figured out the issue today. The socket the bulb fits in was not screwed in the full quarter turn and was not making contact with the little circuit board. This was the case for both the front and back lights. They now work perfectly.
Re: No Interior light door or auxillary
Posted: Tue Oct 29, 2019 11:12 pm
by smwalker
NIce!! That's a new one. I imagine some cops do not like the bulbs on at anytime so they ask the boss to disable and when that does not get done in a month they have all that time on their hands they will break out the leatherman and get to work.