Some Isuzu Ascender owners report experiencing issues where the low beam lights turn off when the high beams are activated. This problem may stem from a relay issue or shorted ground wires. Additionally, owners are advised to check the power supply wire from the fuse block to its source to identify where the power loss occurs. Ensuring that the fuses under the hood are in good condition is also crucial, as a faulty headlight relay could be responsible for selecting the high/low beam current. Some owners find that a blown fuse in the fuse/relay panel controlling the low beam lights could be the culprit. Lastly, it is recommended to check the light bulbs, as low beams can burn out while high beams continue to function. Addressing these concerns promptly may help resolve the low beam issues effectively.
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