Date: Wed, 11 Apr 2007 03:08:56 -0400
Reply-To: Bill Glenn <idahobill@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Bill Glenn <idahobill@GMAIL.COM>
Subject: Re: Elec. Questions. YES it's about Aux Batt. NO,
please don't shoot me.... ;^)
Content-Type: text/plain; charset=ISO-8859-1
On Tue, 10 Apr 2007 20:26:58 -0700, neil <musomuso@GMAIL.COM> wrote:
>Hi all.
>
>I searched, read Bentley, but can't wrap my head around wiring for
>aux batt.
Neil, I'm not going to decipher the wiring that you have, but not too long
ago I conducted a search of the archives with an eye toward compiling a how-
to for myself when I get around to installing an auxiliary battery. I
distilled numerous postings/conversations into the following, which I have
saved as an MS Word document: (thanks to many listees who contributed)
Description of Power to Camper Section
“Always-on” power for the camper section (not controlled by the ignition
switch) comes from one of two places, depending on whether an auxiliary
battery has been fitted.
In the absence of an auxiliary battery, power comes from the rear of the
fuse panel under the dash (current path 30 in Bentley) through a 2.5mm red
wire (un-fused), which runs to terminal 87 on the relay under the driver’s
seat.
If an auxiliary battery has been fitted under the driver’s seat, the power
to terminal 87 of the relay comes from the positive terminal of the
auxiliary battery.
The function of this relay is to energize the refrigerator for operation on
12 volts only when the alternator is producing current, that is, when the
motor is running, consequently this relay is often referred to as the
fridge relay.
When the engine is running and the alternator is producing current, a small
trigger current is sent from the alternator through a 0. 5mm blue trigger
wire to terminal 86 on the fridge relay, which causes the relay to close
(terminal 85 is grounded by means of a red wire with a black stripe). When
the relay closes, power is sent out through terminal 30, and is carried by
a 2.5mm red wire to the input end (bottom) of the black fuse block located
on the “B” pillar behind the driver’s seat.
This red wire supplies power, which flows through the red fuse (16 amp
rating) occupying the rear position in the fuse block, to operate the
fridge on 12 volts, again, only when the motor is running and the
alternator is producing current.
Another 2.5mm red wire connects terminal 87 of the fridge relay to the
input end (bottom) of the fuse block, and supplies power, which flows
through the white fuse (8 amp rating) occupying the forward position in the
fuse block, to the LED panel above the fridge, the water pump, and the
camper lighting.
Note: 2.5mm wire = #10 awg
0.5mm wire = #22-24 awg
