zialeaf
Posts: 20
Joined: Wed Sep 25, 2019 8:21 am
Delivery Date: 01 Jan 2011

2011 LEAF battery wiring harness

Wed Mar 25, 2020 10:54 am

Dear LEAF community,

Due to rodent damage, I need to replace the battery harness that is immediately visible when the battery assembly is removed from the car. It runs alongside and under the main disconnect access panel.

This is a photo of the damaged harness:
https://photos.google.com/photo/AF1QipP ... 3nJzMHlnuY

I need to confirm the part number for his harness so I may procure its replacement. I believe the number is:

295G0-3NA0A

And it appears to be available here:

https://www.nissanpartsdeal.com/parts/n ... 3na0a.html

And here:

https://www.tascaparts.com/oem-parts/ni ... 295g03na0a

Any help is greatly appreciated!

Steve in NM

coleafrado

Re: 2011 LEAF battery wiring harness

Wed Mar 25, 2020 12:35 pm

zialeaf wrote:
Wed Mar 25, 2020 10:54 am
Dear LEAF community,

Due to rodent damage, I need to replace the battery harness that is immediately visible when the battery assembly is removed from the car. It runs alongside and under the main disconnect access panel.

This is a photo of the damaged harness:
https://photos.google.com/photo/AF1QipP ... 3nJzMHlnuY

I need to confirm the part number for his harness so I may procure its replacement. I believe the number is:

295G0-3NA0A

And it appears to be available here:

https://www.nissanpartsdeal.com/parts/n ... 3na0a.html

And here:

https://www.tascaparts.com/oem-parts/ni ... 295g03na0a

Any help is greatly appreciated!

Steve in NM
Your photo link doesn't work.

zialeaf
Posts: 20
Joined: Wed Sep 25, 2019 8:21 am
Delivery Date: 01 Jan 2011

Re: 2011 LEAF battery wiring harness

Wed Mar 25, 2020 1:01 pm

Thanks for letting me know! I think this one should work:

https://photos.app.goo.gl/jy9XDy39NYiGbKPx9

coleafrado

Re: 2011 LEAF battery wiring harness

Wed Mar 25, 2020 1:58 pm

The number you've posted is unfortunately for part of the battery's internal wiring harness, not the car. Note that the listings say "Junction block & harness, 2011-12, #1, without cold weather pk." and "Included With Battery Assembly." Among the block items shown there are the battery's power and data ports, the contactor blocks, and the HV disconnect in the middle of the pack.. These are parts internal to the battery.

I'll look around, but if these cables aren't separate from the car's main harness, you may be SOL for a drop-in replacement. As long as the damage is limited to that area, repair should be possible (but not easy).

zialeaf
Posts: 20
Joined: Wed Sep 25, 2019 8:21 am
Delivery Date: 01 Jan 2011

Re: 2011 LEAF battery wiring harness

Wed Mar 25, 2020 3:16 pm

coleafrado wrote:
Wed Mar 25, 2020 1:58 pm
The number you've posted is unfortunately for part of the battery's internal wiring harness, not the car. Note that the listings say "Junction block & harness, 2011-12, #1, without cold weather pk." and "Included With Battery Assembly." Among the block items shown there are the battery's power and data ports, the contactor blocks, and the HV disconnect in the middle of the pack.. These are parts internal to the battery.

I'll look around, but if these cables aren't separate from the car's main harness, you may be SOL for a drop-in replacement. As long as the damage is limited to that area, repair should be possible (but not easy).
Understood, that makes sense based on all the connectors shown on that harness. I was able to get a dealer to tell me the PN this afternoon. They say it is 24014-3NA4A. The two suppliers I linked to earlier do list this part:

https://www.tascaparts.com/oem-parts/ni ... 240143na4a
https://www.nissanpartsdeal.com/parts/n ... 3na4a.html

I think this may be the correct part. It is above the battery tray/assembly and is fixed to the chassis tunnel. Do this look right to you?

Regards,

Steve in NM

coleafrado

Re: 2011 LEAF battery wiring harness

Wed Mar 25, 2020 5:52 pm

zialeaf wrote:
Wed Mar 25, 2020 3:16 pm
Understood, that makes sense based on all the connectors shown on that harness. I was able to get a dealer to tell me the PN this afternoon. They say it is 24014-3NA4A. The two suppliers I linked to earlier do list this part:

https://www.tascaparts.com/oem-parts/ni ... 240143na4a
https://www.nissanpartsdeal.com/parts/n ... 3na4a.html

I think this may be the correct part. It is above the battery tray/assembly and is fixed to the chassis tunnel. Do this look right to you?

Regards,

Steve in NM
That looks like the right one, but the prices are :shock: . I could see it costing way, way less than $2k to just replace each damaged wire and patch up the existing harness manually.

zialeaf
Posts: 20
Joined: Wed Sep 25, 2019 8:21 am
Delivery Date: 01 Jan 2011

Re: 2011 LEAF battery wiring harness

Wed Mar 25, 2020 6:09 pm

No kidding, I was also taken aback by that cost. Maybe that cable carries real current to the inverter?

Steve

coleafrado

Re: 2011 LEAF battery wiring harness

Wed Mar 25, 2020 8:49 pm

zialeaf wrote:
Wed Mar 25, 2020 6:09 pm
No kidding, I was also taken aback by that cost. Maybe that cable carries real current to the inverter?

Steve
As long as the only cables damaged are the ones pictured, which lead all the way to the trunk, your inverter should be 'safe.' Motor power is only drawn from the battery through the heavily shielded giant cables that run from the front end of the pack to the motor (only about four feet).

Those wires lead to the on-board AC charger (OBC) (which, in the 2011/12 Leaf, is in the trunk), so they should only be carrying a maximum of 16 amps single- or two-phase AC at 120 or 240V. Nothing to scoff at, but nothing that's insanely dangerous provided you correctly replace the wires with the same gauge and insulation quality. The aluminum pipes leading back supply coolant to the OBC, as far as I know.

If any of the CAN wires in that damaged bundle are cut, you might have a hard time reconnecting them properly. The result would be a nonfunctional OBC and no L2/L1 charging - not the worst possibility. You didn't mention it in the post - does the car actually work? Are there error codes? Sure hope you have quick charge.

zialeaf
Posts: 20
Joined: Wed Sep 25, 2019 8:21 am
Delivery Date: 01 Jan 2011

Re: 2011 LEAF battery wiring harness

Thu Mar 26, 2020 8:04 am

Excellent info, understood on all your points.

Yes, the car is currently totally functional and passes a shop diag, so I don't think the damaged cabling is (yet) electrically compromised. I need to personally take a close look at it an decide whether I can just repair it in place with some quality splicing and environmental rated heat shrink. That's definitely within my capabilities and would rather do that than drop $1600 on a harness!

Best regards,

Steve in NM

coleafrado

Re: 2011 LEAF battery wiring harness

Thu Mar 26, 2020 8:10 am

It might be good to spray some bitterant or rodent poison on the wiring once you've patched it up - good luck!

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