Stanely; Good find! I never would have suspected it but it makws sense. If the alternator fails the relay drops out and seperates the 2nd battery from the main. Drive Safely & Good Luck Ken Lewis <Kernersville,NC> 86 VW crewcab;60 356B Coupe -------------------------------------------------- On Sun, 18 Jun 2000 10:02:38 -0700 Stanley Pitman <stanman@blueneptune.com> writes: >Hey Larry, Bill, Beckett etc. > >I've done some digging into connecting 2nd-battery relays, possibly at >the >alternator's "output". > >If you look at the alternators and their electrical wiring diagrams >closely, there are TWO alternator outputs, marked B+ and D+ on wiring >diagrams. > >The main output B+ is directly wired to the battery positive, starter, >etc, >as pointed out by Larry. No battery current flows back into the >alternator >because it has rectifying diodes inside. Their main purpose is >changing >the alternator's generated AC power into pulsating DC power, similar >to >what commutators and carbon brushes did for generators in >pre-alternator >times. > >The auxiliary D+ output serves to drive the alternator lamp and to >drive >the Westy's auxiliary battery relay. A-HA! This is clearly shown in >my >Bentley book in the camper wiring section. > >Hope this removes some of the mystery, for all of us. > >Stanley ________________________________________________________________ YOU'RE PAYING TOO MUCH FOR THE INTERNET! Juno now offers FREE Internet Access! Try it today - there's no risk! For your FREE software, visit: http://dl.www.juno.com/get/tagj. |
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