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Grand Cherokee Trackhawk
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Repair and Diagnosis
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Different car
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Section 117 ((Adaptive Front Lighting System Module - Electrical Diagnostics))
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DTC Troubleshooting
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U1221-00-Lost Communication With Left Headlamp Module
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When Monitored
When Monitored
WARNING:
This page is about a different car, the 2018 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
With the ignition on, headlamps on.