Welcome to the Ford C-MAX Energi Forum
- Start new topics and reply to others
- Subscribe to topics and forums to get email updates
- Get your own profile page and make new friends
- Send personal messages to other members
- Create a photo album and post images. . .more.
Ambient lighting not working properly.
Posted 28 January 2018 - 04:17 PM
Lose this advertisement by becoming a member. Click here to create a free account.
Posted 29 January 2018 - 11:01 AM
There are four lamps associated with the ambient lighting: driver footwell area, passenger footwell area, rear footwell area, and console. The driver's side footwell LED/ECU Lamp ("LEDs") likely needs replaced since the other three LEDs cycle through all colors (see the control logic quoted below). IIRC, around $20 each on other Ford models. Give your dealer a call or look online.
"The ambient lighting control module controls the color and light intensity. The ambient lighting module receives information from the BCM through a LIN circuit for illuminated entry/exit functions. The ambient lighting module provides voltage to all of the Light Emitting Diodes (LEDs). A secondary LIN circuit is routed from the ambient lighting module to all of the Light Emitting Diodes (LEDs). Each LED changes color and intensity based on the input from the ambient lighting module." -Service Manual
Posted 29 January 2018 - 02:26 PM
Posted 29 January 2018 - 04:40 PM
Exactly, the ambient light LED assembly in the footwell includes a processor which is likely the issue. Attached is the wiring diagram with the assembly circled in red. As you can see there are three diodes in the assembly (red, green, blue).
Do you have an extended warranty (assuming this is covered)? If you take it into the dealer now, they will likely perform diagnostics to verify that it's not a wiring issue. But since all ambient lighting worked before but the green, IMO it's not a wiring issue but now a complete failure of the driver's side LED assembly. This could be a $100 bill plus part.
If you can DIY, one should be able to take the passenger footwell light and try it on the driver's side to validate that the driver's side has failed. There also may be a DTC stored in the BCM which can be scanned with the ForScan App for smartphones.
Ambient Lighting.JPG 116.36KB 0 downloads
Posted 29 January 2018 - 07:40 PM
Posted 29 January 2018 - 09:35 PM
Now I'm wondering if the LED LIN wiring / connector has an issue as I didn't know that the blue diode remained lit. Perhaps, the default lighting is blue if the LED ECU receives a mssg from the BCM via the LIN to turn on and no mssg on the LED LIN circuit as to color. If you can swap the driver and passenger LEDs, you should be able to see if the driver LEDs function the same on the passenger side.
Edited by plus 3 golfer, 29 January 2018 - 09:40 PM.
Posted 30 January 2018 - 05:48 AM
My color cycling button does nothing, but the handle LEDs do turn red when the door is open. It's not something I'm going to spend money on.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users