Second battery for my 2003 Nissan Patrol

Submitted: Wednesday, May 11, 2005 at 16:04
ThreadID: 22897 Views:2213 Replies:4 FollowUps:3
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Hi all, I am new to this site so hope I do all correct. Have just purchased my first 4x4 and want to run two batteries. In my previous ford wagon I used a two pole oil pressure switch before the silver tipped relay. This allowed me to use original battery for starting only, once oil pressure was up 2nd battery started to charge.
Want to do the same in this Nissan Patrol but not sure if can do because of the Guard over the original oil pressure sender unit. Can somebody out there please help me with your ideas. Thank you.
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Reply By: Mainey (WA) - Wednesday, May 11, 2005 at 23:45

Wednesday, May 11, 2005 at 23:45
PandJ,

what sized relay?
why not wire it off the temp sender?
AnswerID: 110941

Follow Up By: PandJ - Thursday, May 12, 2005 at 09:51

Thursday, May 12, 2005 at 09:51
Mainey,

Hi, the parts are ok I have them.
Can,t wire from temp gauge --- need oil pressure!
0
FollowupID: 367374

Follow Up By: PandJ - Thursday, May 12, 2005 at 09:52

Thursday, May 12, 2005 at 09:52
Mainey,

Hi, the parts are ok I have them.
Can't wire from temp gauge --- need oil pressure!
0
FollowupID: 367375

Reply By: muzzgit (WA) - Thursday, May 12, 2005 at 00:40

Thursday, May 12, 2005 at 00:40
You will need spike resistance for a modern car. I don't know whether the setup you want to use will cause problems. Ask your local auto sparkie.

Personally I'd get a redarc.
AnswerID: 110946

Follow Up By: PandJ - Thursday, May 12, 2005 at 10:01

Thursday, May 12, 2005 at 10:01
Hi Muzzgit,

Bit hard to go to a auto sparky in the bush.
The set up I use is ok (cheap & effective) the only problem is the guard over the original oil sender unit which is mounted just under turbo.
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FollowupID: 367378

Reply By: Keith_A (Qld) - Thursday, May 12, 2005 at 19:24

Thursday, May 12, 2005 at 19:24
Hi P&J. We have a 99 Patrol, and installed the Redarc - also called a 'Smart solenoid' or 'Battery isolator'.
The unit only connects the main to the second (auxiliary) when the main is fully charged (I think to 13.5V).
You run all your accessories off the auxilliary, and never have to worry about the main being drained by the fridge/map-lights/inverter/trailer- battery or whatever.
There is a bypass wire, which we connected to a switch on the dash.
This gives you the option to connect both batteries together (eg to use the winch).
Costs around $150. Rugged and reliable - simple to DIY.
Check this forum and perhaps one of the Patrol forums (http://autos.groups.yahoo.com/group/patrol4wd/).
Most dual battery setups use them.....
Regards................Keith.
AnswerID: 111042

Reply By: PandJ - Thursday, May 12, 2005 at 19:46

Thursday, May 12, 2005 at 19:46
Hi Keith,
Thanks for your thoughts and idea. I really prefer to use my set up, very reliable and cheap. May have to talk to those customer service folk at nissan and try to explain something new to another office worker.
Tnx PandJ
AnswerID: 111051

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