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[aprssig] Negative Fuses

Dave Baxter dave at emv.co.uk
Thu Jan 26 10:20:43 UTC 2006


> A fuse in the neg lead is only to prevent problems if the
> main ground to the battery and frame fails.
> Which is not very often.

More often than you might imagine!...  If not total failure, high
resistance (only a fraction of an Ohm, but...) can encorage starting
currents to take the "scenic" route, sometimes with "interesting"
results...

Most automotive electrical problems, and "odd" bahaviour (especialy of
external lights etc) can be atributed to a bad ground somewhere.  The
clasic indicator/brake light interaction being a prime example.

Take Care...

Dave G0WBX.




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