* Double-check that you are using the correct fuse amperage for the courtesy lamp circuit.
* Inspect the wiring and connectors for any signs of damage, fraying, or short circuits.
* If there are any issues with the courtesy light itself, such as a malfunctioning switch or a faulty light fixture.
* Verify if the dome light switch is functioning appropriately and not stuck in the "on" position.
* If you have added any aftermarket accessories that draw power from the courtesy lamp circuit.
* Ensure the courtesy lamp or associated components have a proper ground connection.
* Adding additional lights or devices to the courtesy lamp circuit beyond its capacity can cause the fuse to blow.
* If your vehicle uses a relay for the courtesy lamp circuit, check for a faulty or stuck relay.
* Inspect the wiring for any signs of damage or wear, particularly in areas where the wires pass through tight spaces or are exposed to moisture.
* The fuse holder itself could be faulty, causing the fuse to blow repeatedly.
* Rarely, a defective fuse can also be the culprit. Try replacing the fuse with a new one of the same amperage rating.
