I thought that you were saying to wire this blue wire to a hot while ignition is on wire... is there a wire that it hot after ignition is on?... or are you just saying to get heavier than 10 guage... would 8 guage be enough... someone here really felt that 10 guage would slow down current and stop or prevent overheating of the main battery or altenator... 

From: Mark Drillock <mdrillock@COX.NET>
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Adding a Deep Cycle Battery and heavy duty relay

> What you are doing is very dangerous if not done properly and you can
> burn up your whole van if you make a mistake. You can't just pick and
> choose parts of how others have done things without understanding the
> issues involved in their choices. 10 gauge wire is not heavy enough
> unless you design the system right. Connecting the batteries together
> with such small wire should not be done while the starter is operating.
> Using a "hot while ignition on" wire to control the relay is a bad idea
> because of this but Matsuwesty says that he used battery cable to
> connect the relay. Battery cable is not 10 gauge.
> 
> Mark
> 
> listmember wrote:
> 
>  > hmm, honestly, I don't where the other end of this blue wire is
>  > supposed to go. the hella relay I have now isn't set up that way.
>  > I have 10 guage wire now.
>  >
>  > I just read
>  > http://home.earthlink.net/%7Ematsuwesty/page14.html
>  > and it covers a four post relay... and that the fourth wire should be
>  > wired to a hot wire... that is only hot when the ignition is on... So
>  > since I'm puttiing my second battery under the rear seat... I assume
> I > will want the relay also under the rear seat.. so the quesiton
> arises > where will I find this hot when igition is on wire...
> 

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