It's a good idea to put a fusible link (not a fuse) in the alternator or
generator output connection, but the OEM harness never had any such
components unless you count the entire harness as a fusible link.
Because a fusible link does generate quite a bit of heat when it goes,
it's a good idea to install it where there is ventilation.
Rick has OEM and 50 amp ammeters IIRC. I just swapped out my (not wired)
50A ammeter for an O2 sensor gauge - best trade I ever made. If/when I
figure I don't need to have the exhaust sensor gauge in the dash anymore
then I'll look at getting a voltmeter to put in its place.
The problem with a high current ammeter is that you need to have large
gauge wires running to it. The 10 gauge wiring used by the factory is
adequate for the 30/35 amp output of the generator. For a 50 amp circuit
you should really have 8 gauge wires, and a 100 amp alternator would
require 6 or 4 gauge wiring if that level of current was sustained for
any length of time. Having multiple cables of that size running under
the dash is pretty messy.
A voltmeter will indicate pretty accurately the functioning of your
charging system, and it doesn't require any significant wiring at all.
Theo
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