986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Light bulbs burning out one after the other

roadracer311 · 10-09-2009, 08:22 AM

I would check your charging system.

Check the voltage across the battery terminals with the car running. I had a motorcycle that was going through headlights one after the other, and it turned out that the charging system had stopped regulating, and while riding, it was running at about 20V, which was causing the bulbs to draw nearly 2x the power they were designed for, which was causing then to fail.

10-09-2009, 08:22 AM	#2
roadracer311 Registered User Join Date: May 2007 Location: San Francisco, CA Posts: 218	I would check your charging system. Check the voltage across the battery terminals with the car running. I had a motorcycle that was going through headlights one after the other, and it turned out that the charging system had stopped regulating, and while riding, it was running at about 20V, which was causing the bulbs to draw nearly 2x the power they were designed for, which was causing then to fail. __________________ 2003 Boxster S 1995 Ferrari F355 Spider San Francisco, CA