I have not had any problems with my Garmin Nuvi. No blown fuses. I do have an issue when the engine is not running, the unit stays on, even when I remove the key from the ignition. This never used to happen with my previous car.
I agree with Cyborg1978. There may be a problem with your plug and/or lead. Garmin says there is a fuse in the plug that may need replacing periodically.
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2010 WS Fiesta Zetec
1997 Camry CSi
1995 SB Barina
1986 MB Barina
1975 TX Gemini
1973 LC Torana
1972 XA Falcon 500
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