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Old 05-27-2013, 07:06 PM   #1
SilverPony2001
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Adding ambient lighting to back with OEM system

Has anyone looked at the control module for the OEM ambient lighting? I know certain vehicles like a 2011 Fusion have lighting in the back as well as the front. Do all vehicles use the same ambient lighting control module? Would it be possible to add lighting to the back using OEM parts that would plug into the factory module? You would think if every vehicle used the same module, there should be a spot to plug in the one or two additional LED bars for the back seats.


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Old 05-27-2013, 07:46 PM   #2
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The focus buttons to control the lights is expensive. I am not sure but the bcm probably controls the lights. You may be able to tap into part of the lighting and run more lights because LEDs have such low current draw.

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Old 05-27-2013, 08:06 PM   #3
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Originally Posted by SilverPony2001 View Post
Has anyone looked at the control module for the OEM ambient lighting? I know certain vehicles like a 2011 Fusion have lighting in the back as well as the front. Do all vehicles use the same ambient lighting control module? Would it be possible to add lighting to the back using OEM parts that would plug into the factory module? You would think if every vehicle used the same module, there should be a spot to plug in the one or two additional LED bars for the back seats.
Adding LEDs is a little more complicated than adding incandescent bulbs.

Where one would simply add bulbs in parallel knowing that the resistant will drop and therefore the circuit will simply require more power, LEDs are more complex in that they operate within a very small window of minimum and maximum forward voltage.

I haven't looked at the control module but there's probably a limiting resistor of a specific value that was calculated to operate with a specific number of LEDs wired in a series/parallel combination with known electrical characteristics (If, Vf).

In other words, unless you know exactly what you're doing you're better off with a third party solution.
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Old 05-27-2013, 08:17 PM   #4
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Adding LEDs is a little more complicated than adding incandescent bulbs.

Where one would simply add bulbs in parallel knowing that the resistant will drop and therefore the circuit will simply require more power, LEDs are more complex in that they operate within a very small window of minimum and maximum forward voltage.

I haven't looked at the control module but there's probably a limiting resistor of a specific value that was calculated to operate with a specific number of LEDs wired in a series/parallel combination with known electrical characteristics (If, Vf).

In other words, unless you know exactly what you're doing you're better off with a third party solution.

I'm asking more if the ambient control module is the same in every car. If so, you would assume there would be spots on the module to plug in the two missing lights for the rear.

If you look at this picture:




It looks like it has 2 lights in the front footwells, 2 lights per door storage bin, 2 lights per door handle, and a light in the cup holder. The Focus has all these as well. But there are also 2 more lights in the rear foot wells that the Focus lacks. If we were to assume whatever controls the ambient lighting is the same in every car, there should be a place to add those additional lights.

On a side note, did the 2011's have back ambient lighting?
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Old 05-27-2013, 09:01 PM   #5
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I'm asking more if the ambient control module is the same in every car. If so, you would assume there would be spots on the module to plug in the two missing lights for the rear.
If this Ebay auction is to be believed then yes, the module is the same in quite a few Ford vehicles.

http://www.ebay.com/itm/OEM-STOCK-FO...5c46a5&vxp=mtr
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Old 05-28-2013, 09:22 PM   #6
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I have added the rear ambient lights to my Ti focus . Purchased 2 new front ambient lights and installed them under each front seat to focus the on the rear footwells. Tap into each front under dash lights same polarity connections . Almost no additional electrical draw. these help brighten up the dark black rear interior and look great.
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Old 05-28-2013, 09:36 PM   #7
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I have added the rear ambient lights to my Ti focus . Purchased 2 new front ambient lights and installed them under each front seat to focus the on the rear footwells. Tap into each front under dash lights same polarity connections . Almost no additional electrical draw. these help brighten up the dark black rear interior and look great.
Did you wire them all the way up to the front to tap into the front OEM lights? Or is there any place in the center console they converge? Any pics?
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Old 05-28-2013, 10:39 PM   #8
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I have added the rear ambient lights to my Ti focus . Purchased 2 new front ambient lights and installed them under each front seat to focus the on the rear footwells. Tap into each front under dash lights same polarity connections . Almost no additional electrical draw. these help brighten up the dark black rear interior and look great.
Write-up? Part numbers? COME ON MAN!

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Old 05-29-2013, 08:56 PM   #9
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Ok I wired them up to the front ambient lights 1 each side . Came along door sill then up through carpet under seat where factory seat wiring exsists. Bought the 2 front ambient lights and lenses along with 2 factory pigtail connectors. Just tie rapped the new lights under front seat to seat frames. Matched the wire for wire front to rear lights. They work and look great. Can be dimmed and change colours just like the fronts.
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Old 05-29-2013, 09:06 PM   #10
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Ok I wired them up to the front ambient lights 1 each side . Came along door sill then up through carpet under seat where factory seat wiring exsists. Bought the 2 front ambient lights and lenses along with 2 factory pigtail connectors. Just tie rapped the new lights under front seat to seat frames. Matched the wire for wire front to rear lights. They work and look great. Can be dimmed and change colours just like the fronts.
Do you have any pics of the install or part #'s you used?

From what I found out, the part number for the "Long Bar LED" is BE8Z-13E701-A.

The part number for just the single "LED with Lense" is 7S4Z-13E701-AE

Did you use the BAR style or just the single LED with Lense?
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