Problem with Redarc Battery Isolator / Secondary Battery

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gav
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Problem with Redarc Battery Isolator / Secondary Battery

Postby gav » Mon Aug 24, 2020 3:31 pm

I have a secondary battery that lost it's charge. While investigating I noticed that the Redarc battery isolator was behaving unexpectedly.

The isolator would briefly light up, then immediately turn off. The negative lead from the secondary battery, which leads directly from the negative terminal to the truck body, would jump each time. This process would repeat itself as you can see in the video. Any idea what the issue might be or how to diagnose it?

The primary battery has a charge just over 12.7 volts.

https://www.youtube.com/watch?v=UEgP1TPAf8A


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gav
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Posts: 53
Joined: Wed Dec 01, 2010 5:09 pm
Location: Christchurch
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Re: Problem with Redarc Battery Isolator / Secondary Battery

Postby gav » Tue Aug 25, 2020 10:18 am

Just in case someone stumbles across this thread with a similar issue. I'm getting some good info from the following:

http://www.nissanpatrol.com.au/forums/s ... ry-Battery
1992 Nissan Safari LWB - still a bit green, but getting there

NZ Topo Map - http://www.topomap.co.nz

MihiT
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Re: Problem with Redarc Battery Isolator / Secondary Battery

Postby MihiT » Sat Sep 05, 2020 10:33 am

12.7 is low and may be drawing down too much current, causing voltage drop tripping out the cutoff.
Primary side should be 14.4 when running.
- 1990 LWB Safari flatdeck, TD42 -

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gav
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Re: Problem with Redarc Battery Isolator / Secondary Battery

Postby gav » Sat Sep 05, 2020 3:39 pm

@MihiT - thanks for the input. Turned out that the aux battery needed replacing as a cell had failed or something.
1992 Nissan Safari LWB - still a bit green, but getting there

NZ Topo Map - http://www.topomap.co.nz

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