BCM issue, some of the back light are not working

2021 JEEP GRAND CHEROKEE
6,000 MILES • 3.6L • 6 CYL • 4WD • AUTOMATIC
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DHEYAA
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I have a problem with BCM some of the backlights do not work and after checking it was found that it was a malfunction in BCM. my question is, how do i find the backlight lines in the BCM map specifically stop lamp and the turn signal. Help
Mar 10, 2022 at 2:42 PM
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JACOBANDNICKOLAS
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Hi,

The vehicle should be under warranty and this part replaced free of charge.

Regardless, I have attached the wiring schematics requested. One pic is of the signal circuit and the other is for the stop lamps.

Here is a link you may find helpful when testing:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this is what you needed.

Take care,

Joe

See pics below.
Mar 10, 2022 at 6:53 PM
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DHEYAA
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Are these diagrams for BCM on the vehicle listed above?
Mar 11, 2022 at 5:54 AM
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JACOBANDNICKOLAS
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Hi,

Yes, they are the specific circuits you requested and how they work with the BCM.

See pics below.

Joe
Mar 11, 2022 at 12:52 PM
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DHEYAA
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Thank you very much. You helped me. Can you provide me with a complete schematic of the taillights inside the BCM of my vehicle listed above?
Mar 11, 2022 at 1:57 PM
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JACOBANDNICKOLAS
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Hi,

Are you referring to the printed circuit board in the BCM? That isn't something I would have. I do have the wiring schematics for the exterior lighting, but I need to know if you have an HID or non-HID lighting system.

Let me know if that will help you.

Take care,

Joe
Mar 11, 2022 at 3:41 PM
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DHEYAA
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I need just for exterior lighting. Or for taillight.
Yes, hid light system. This number BCM 68438 337AD.
Mar 11, 2022 at 9:12 PM
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JACOBANDNICKOLAS
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Hi,

No problem. I attached the schematic below for the HID system. Note that the schematic is two pages long in my manual. I had to check each in half to make it readable for you. However, I did overlap them so you can follow from one to the next.

Let me know if this helps or if you have questions.

Take care,

Joe

See pics below.
Mar 12, 2022 at 12:07 PM