I use one that looks like the Go Westie one but I got mine at a NAPA
store for about ten bucks...(about 4 yrs ago, given, but still...)   I have
the same one in my F-250 Powerstroke, still going strong after 300, 000
miles and actual years of keeping a second battery charged...  The one in
my Vanagon is under the seat and makes a nice clunk when I activate it with
a secondary switch....a lighted toggle switch just below my legs...
  So, it works off the x-relay, I think that is the one that is only
powered when the motor is actually running...and I can switch it completely
off, should I want all my alternator to go right to the starter battery...
  Whatever you do be sure to fuse the wire between the two batteries....

On Thu, Jul 31, 2014 at 3:56 PM, mark drillock <mdrillock@cox.net> wrote:

> Too late to close the barn, those horses are long gone.
>
> http://www.gowesty.com/ec_view_details.php?id=21044&
> category_id=125&category_parent_id=
>
> isolator, separator, combiner, battery relay.....call it what you like,
> everyone else does
>
> Mark
>
>
> Dennis Haynes wrote:
>
>> Let's not confuse isolators (diode devices) with relays or contactors.
>>
>> Dennis
>>
>