Question about 'House' battery connection...

[t3brian]

Hello all..... I am undertaking converting the original battery
configuration in my 84' PT 40 and I have some questions.......

Original:
4- RV deep cycle 12V batteries mounted on a battery tray in the engine
compartment, + lead connected to a power distribution 'stud' with 2
leads directly connected to the starter & 1 lead directly connected to
the 'Jump Start post' at the rear of the compartment on a frame rail
which then is connected to a couple of relays that are connected to the
key switch and the selector that allows for the engine to be started
from the 'rear' or 'front' ignition switch.

New:
2- 12V starting batteries in the engine compartment.
2- 4D deepcycle batteries in a 'new' converted stowage area just in
front of the 'rear' wheel axel.

Issue: I want to seperate the 'Start' batteries & the new 'house'
batteries.... I have an isolator to accomplish this.... however I am
having difficulty determining where the power source for the
current 'house 12V' is coming from...... it seems that when I look at
the starter.. there is 5 heavy guage wires connected to it... 2 of
which come from the + battery connection post and 2 of which go into
the compartment that houses the existing isolator, DC-AC redi line
generator along with 3 relays that appear to all be configured to
switch between combinations of power UP for the redi line, the
generator battary and some other features... but none of the
connections seem to be the connection to the existing 'house DC'
supply...

In order to properly configure the new battery configuration I have to
isolate the dc supply for the starter & the ignition switch and
seperate the existing 'house DC' so that I can supply each one with
it's own battery bank.. and place the isolator between the 2 so that
both battery banks are recievng a charge from the AC charger and the
alternator......

Does anybody hqave an idea as to where the existing 'house DC'
connection is coming from??? is it one of the cables attached to the
starter??? or do I need to look elsewhere???

Thank You
Brian
'The Green Hornet'