Buick Lucerne fuel pump relay failure causing starting issues and potential fuse box damage on Buick Lucerne

Some Buick Lucerne owners report experiencing issues related to fuel pump relay failure, including starting problems and potential damage to the fuse box. These issues can arise when the fuel pump relay overheats, causing it to melt into the fuse box and disconnecting the fuel pump, which ultimately stops the vehicle from running. Common symptoms reported include intermittent power loss to the fuel pump, inability to start the car, and unpredictable pump operation that leads to stalling or rough running. Additionally, some owners have noted that the fuel pump relay problem is often linked to a seat bracket contacting the rear fuse box, exacerbating the situation. Poor terminal contact at the fuel pump relay terminals may also require the replacement of the rear fuse block if terminals are loose or cavities are melted. Furthermore, corrosion in the fuse box located under the back seat can compound these issues. In severe cases, the fuel pump relay can burn fuses quickly, leading to shorting out of the fuse box and posing a safety risk, including the potential for fire under the back seat. It is crucial for owners to address these concerns promptly to prevent further damage and ensure safety.