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Discussion Starter · #1 ·
I have a 2005 Frontier V6 Crewcab.

What is this mystery harness that goes in between the trucks cabin harness and the BCM?

It has the same connectors on the input and output of this mystery harness, like I could remove it and plug the cabin harness straight into the BCM.

It also has two 10a fuses.




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Maybe for a higher trim level? Just a guess...
 

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Discussion Starter · #3 ·
My Frontier is an automatic trans, SE trim level, 4WD.

Not sure if that will help anyone to answer my question.

I don't want to cut the harness apart just to check, am in the middle of installing an alarm and don't want to waste my time.


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Discussion Starter · #4 ·


Pocket screwdriver is pointing at the two 10A mini ATM fuses.


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I have a 2005 Frontier V6 Crewcab.
It has the same connectors on the input and output of this mystery harness, like I could remove it and plug the cabin harness straight into the BCM.

It also has two 10a fuses.
My guess is that Nissan discovered that they accidentally omitted two 10 amp fuses from the original design - and needed a quick, plug-in fix.
 

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My guess is that Nissan discovered that they accidentally omitted two 10 amp fuses from the original design - and needed a quick, plug-in fix.
My guess would be the optional rear-dimming mirror with the garage door controls/temperature sensor. But that's just a guess, I have them, I may try to have a look tomorrow.
 

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Discussion Starter · #9 ·
Wife's 2006 Xterra does not have this harness. I believe it is to correct a mistake Nissan forgot when they created the 2005 model years.

Amazon has it listed as a "Jumper Harness".




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I think this was a service bulletin fix to add a rear tail lights fuse; if you spliced it to protect BCM from short ckt. Some dealers installed most did not. If you used the Nissan 7-pin kit for trailer lights etc you did not need it.
 

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It was installed on various 04-05 Nissan vehicles per a voluntary service campaign, P5234, and described in Nissan technical service bulletin NTB05-086. It's "enhanced electronic circuitry which may help further protect a vehicle from damage or fire caused by a short circuit in the electrical system of a towed trailer due to problems with the trailer's wiring or mis-installation of trailer lighting or electrical accessories."
 

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Discussion Starter · #12 ·
It was installed on various 04-05 Nissan vehicles per a voluntary service campaign, P5234, and described in Nissan technical service bulletin NTB05-086. It's "enhanced electronic circuitry which may help further protect a vehicle from damage or fire caused by a short circuit in the electrical system of a towed trailer due to problems with the trailer's wiring or mis-installation of trailer lighting or electrical accessories."


So is it true that 2006+ models has the two 10A fuses built-in?


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Yes. The campaign was to update the pre-2006 trucks to the same trailer circuit protection capabilities as the 2006 models.
 
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Yes. The campaign was to update the pre-2006 trucks to the same trailer circuit protection capabilities as the 2006 models.
smj999smj, you are truly one of the most informed and helpful posters around here.
Thank you for all your contributions! ::smile::
 
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^ I 2nd this @smj999smj. Not only do you informatively answer questions, but almost always include a part number, a link, or some other supporting info.

Your posts are awesome!
 
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Thanks. I get a little busy sometimes as I moderate on NissanForums.com as well as thenissanpath.com and occasionally answer some posts at NissanHelp.com. My main ride is my R51 Pathy (the '03 Frontier SVE is my backup ride), so I usually start at the Pathfinder site first and then hit the others if I have time. Glad if I can help!
 
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2005 Nissan Frontier

Bringing this thread back. I ordered the sub-harness from amazon after doing the test described here. http://www.nicoclub.com/manuals/Pat... CAMPAIGN BODY CONTROL MODULE SUB-HARNESS.pdf

Body control module tested good.
Wondering if I got ahead of myself. Will simply adding the sub-harness fix my problem?

I have the proper wiring harness sold by e trailer. All plug and play. No splicing. Currently have tail lights and left turn/brake light at 4 pin trailer connector.

Thanks
 
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