What causes the LED low beam malfunction in modified 2012 Focus?

1 Answers
JudeFitz
07/30/25 10:38am
The causes of LED low beam malfunction in modified 2012 Focus may include power difference and circuit incompatibility. Power difference: The original halogen bulbs are typically 55W, while LED headlights usually range between 20-40W. This power difference leads to current variation. When the vehicle's computer detects this current mismatch between the new lights and original ones, it may trigger a fault warning. This issue can be resolved using a decoder. Circuit incompatibility: Modified lighting systems usually include a voltage regulator and fuse. However, incompatibility with the vehicle's original circuit may cause frequent fuse blowouts. Additionally, the voltage regulator operates at extremely high temperatures, and improper installation can melt wiring, potentially causing short circuits.
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