Isuzu Ascender low beam lights turning off when high beams activated on Isuzu Ascender

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

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.

1 person reported this problem
0 comments
Schedule Repair

Isuzu Ascender vehicles with this problem

0 model year affected

Search for another problem

RepairPal Car Genius

Ask our experts about your Isuzu.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts