ABR - SIDEWINDER posted:

Hi Rare

Best to use the follow-up link and not the reply otherwise you are talking to your self and I don't get the response unless I return to this thread.

Sure-Power make diode and relay type isolators and also make isolators for ARB. (Not me ABR). ARB don't have their own isolator like me ABR, Piranha and Redarc.

Please email me those pictures, battery specs and the isolator part number.

I can't offer any advice without ALL the information.

Regards

Derek from ABR

Member - Myles F (QLD) posted:

G’day Muddie,
I have two 760cca’s as cranking and a 620cca as the auxiliary battery. Would not start on cold desert mornings with one battery. Again, that’s my first hand experience.
Myles.

Sir Kev & Darkie posted:

Myles,

You also added that one battery had collapsed so there lies the problem. A single battery in good condition will start a T/D


Cheers Kev

Member - Myles F (QLD) posted:

G’day Kev,
Yep you could well be right…. All the charge from the good may have been being drained by the dead battery. I made a similar enquiry as Rare on this very forum when I first bought my new 100 series in 2006. The consensus then was that there will be times when both batteries are required for starting.
Myles.

Muddie posted:

I was starting with one OE 450cca for 2 years and it died 2 weeks after starting no worries on a 3 day snow camping trip which we had 75mm of snow overnight and the temp dropped to -6.
When they are dead they are dead.

Member - Myles F (QLD) posted:

Yep Muddie, people are the same…. There is no half dead.
Although others on the forum convinced me to maintain the two starting batteries, with the benefit of hindsight I may well have been able to start if I had completely disconnected the failed battery.
Myles.

Member - Graham H (QLD) posted:

If you want to be sure, do as I did and put a relay in that hooks both together

for starting and drops out agian when you let the key go.

Otherwise just press the button on the dash to link them.


(You do have one dont you)

Member - Myles F (QLD) posted:

G'day Graham,
Sure do, but it still didn’t get enough to the starter motor…. The dead battery was sucking up all the charge from the other two. At the time I didn’t know which battery had failed and I actually thought there may be a fault with the earth to the starter motor and not a battery problem at all. I now carry a good quality multimeter. I had a week of getting jump started and on the last morning needed three vehicles to get me going….. very embarrassing as one was a Patrol. Stopped in at Alice for supplies half way through our trip and diagnosed the failed battery which was replaced with no further issues. I was amazed the dead battery drained so much of the charge.
That problem won’t happen again because with my new beaut multimeter I will know where the problem is.
Live and learn.
Myles.
PS That's me with the hat.

Bugger

Muddie posted:

As I have said for 2 years I have had no issues starting from 1 750cca, I did boil my 115 ah deep cycle aux in the Simpson this year so have replaced it with hybrid exide which will start the TD.