[Milsurplus] Accessory Bus in vehicles

[Tom Norris]

I always *made* a standardized hookup when I was doing installs - which
I did for over 20 years, both in private shops and for various govt agencies.
Simply used the ACC bus to drive the relay coils that actually switched power
to the power accessories used. Almost always tapped it at the fuse block, since
it was easier - for the standardization reasons already cited. Since I kept
my own switched power bus the same from vehicle to vehicle, I only had to
dig for the accy power once per vehicle.  And with each relay fused, I never
had a problem with the equipment damaging something expensive like an
ignition switch. :-)

Tom


>It makes it a lot of fun when you are trying to install alike 
>radios, equipment or
>lightbars in dissimilar govt, mil or public safety vehicles.  No 
>standardization...
>Jay
>
>----------
>Just a little comment on the ACC mode in automobiles, it is
>interesting to note how the different manufacturers model
>their ACC circuits in today's
>vehicles.