* Modifying the wiring harness: This is the most complex and potentially risky method. You'd need to trace the DRL wiring, and either disconnect it entirely (which is NOT recommended as it could affect other systems and is dangerous) or try to interrupt the circuit. This requires significant electrical knowledge and expertise and could void any warranty you may have. Incorrectly modifying the wiring could damage your vehicle's electrical system.
* Using a relay bypass: This involves installing a relay that can be switched to interrupt the DRL circuit. This is a more advanced technique than simply pulling a fuse and requires understanding automotive electrical systems.
* Replacing the BCM (Body Control Module): The Body Control Module manages many vehicle functions, including DRLs. It's possible a replacement BCM from a different year or model might not have the DRL function enabled, but finding a compatible and appropriately functioning replacement would be difficult and expensive.
Why it's not recommended:
Disabling DRLs is generally discouraged for safety reasons. They significantly increase the visibility of your vehicle during the day, reducing the risk of accidents. Tampering with the vehicle's electrical system can lead to other problems and possibly even create a safety hazard.
In short: While technically *possible* through advanced wiring modifications, disabling the DRLs on a 1998 Buick Regal GS is not practical or recommended for the average person. The risks involved outweigh the benefits. If you have concerns about the brightness of your headlights, consider purchasing and installing lower-wattage bulbs (but ensure they meet legal requirements).
