You did not need to fool with those wires on the back at all. No wires
needed to be cut or rerouted. All you needed to do was remove fuse 3 and
leave it out. Then run a fused wire from the aux battery to the lower
leg slot of fuse 3. Done.

Mark

Florian Speier wrote:
> ok, I solved it. vw couldnt possibly make the numbers on the connectors any
> smaller. so i rewired not b11 and b12 but 3 and 5 or something like that. i
> thought the number was to the right of the connector and not the left, so i
> rewired the wrong ones. i checked that a few times until i saw it.
> brrrrrrrrr.
> florian
>
> On Sun, May 11, 2008 at 3:11 PM, Florian Speier <groups.florian@gmail.com>
> wrote:
>
>> I just installed a second battery under the drivers seat. I took out the
>> existing relay and use a surepower 1315. I disconnected the two other little
>> wires at the old relay, not really knowing what they are for, and used the
>> thickj red existing wire, which is always hot, to connect to the main
>> battery side of the surepower. the other side of the surepower is connected
>> to the aux battery.
>> the aux battery directly feeds the wire to the fridge that goes through the
>> b pillar fuse box and a new cable that i ran to the main fusebox which now
>> directly feeds the cables from connector points b11 and b12. according to
>> bentley, that should be radio, interior lighting, cigarette plug, that are
>> now going off the aux battery.
>> however, theory and actually observed behaviour dont quite match.
>> (background, this is an 87 full camper, subaru ej22 conversion, headlight
>> relay upgrade, otherwise stock wiring)
>>
>> so with b11 and b12 rerouted and all the connections for the 2nd battery
>> made, but not yet installed and hooked up, the following weirdness is
>> observed:
>> -the fuel gauge is not working.
>> -the hand brake warning light is stuck on on
>> -the cabin lights and back camper light still work (which they shouldnt
>> with b11 and b12 without power.
>>
>> if i connect the second battery, with ignition off:
>> -the fuel gauge comes on
>> -hand brake light is still stuck
>> -water temp sensor starts blinking for a little while, but then goes off.
>>
>> if i know switch on ignition:
>> -the fuel gauge goes off
>> -the hand brake light is still stuck in on
>>
>> what the ?????
>> i can only think that b11 and b12 are routed differently in my van, but its
>> a miracle to me why the fuel gauge goes off again when ignition goes on.
>>
>> florian
>