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Registered
Join Date: Oct 2004
Posts: 9
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OEM vs. Standard GBC fuses
After replacing my plugs/wires today I noticed the brake lights & driver side headlamp/tailight on my '87 911 Carrera Targa were not working. After checking the bulbs (which were fine), I checked the fusebox. Both 16 amp fuses were blown. The only fuses available at the store were the standard European GBC 16 amp fuses. I installed the new fuses, turned on the lights/tapped the brakes and within seconds the plastic fuse melted/smoked (but did not blow). Last year, when replacing the A/C fuse with std. glass fuses it blew several times. After replacing it with a genuine porsche fuse it was fine. Has anyone else encountered such a problem with regular store bought fuses? The GBC are plastic and the OEM seem to be porcelin. Could this actually be an indication of something more serious such as a short? If so, how can I diagnose the problem?
Last edited by tescamilla; 10-28-2005 at 03:32 PM.. |
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10-28-2005, 03:18 PM
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Join Date: Jul 2002
Location: Southern California
Posts: 5,067
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Sounds like the problem is a short. I wouldn't focus on the fuse...fix the short.
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1984 Targa |
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10-28-2005, 05:46 PM
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Join Date: Oct 2004
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Thanks. How do I dternine where the short actually is?
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10-28-2005, 06:46 PM
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Join Date: Jul 2002
Location: Southern California
Posts: 5,067
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Pelican has wiring diagrams for various years of the cars.
Frankly, I don't know how to troubleshoot electrical shorts. There's an art to it, however. I'm sure someone will chime in. Haynes publishes an automotive electrical manual. It's generic (i.e., not Porsche-specific), but it contains sections on how to troubleshoot car electrical problems. Good luck.
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1984 Targa |
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10-28-2005, 07:02 PM
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