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I had to disconnect battery, and bcm, I hooked everything…

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I had to disconnect battery...
I had to disconnect battery, and bcm, I hooked everything back up, now my speedometer/tach doesn’t operate, and back gate and side door doesn’t operate.... any ideas?
Submitted: 8 months ago.Category: Nissan
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Answered in 1 minute by:
12/13/2017
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago
Mechanic01
Mechanic01, ASE Certified Technician
Category: Nissan
Satisfied Customers: 3,752
Experience: Owner at Baltic investments
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Hello my name is ***** ***** welcome to just answers! I will be assisting you with all of your vehicle questions today. Give me one moment while I review your question and come back with a answer. Please be aware I do not know your skill level or abilities so I will be asking a lot of questions and in a lot of cases we will respond to each other quite a lot before we find a solution. As far as phone calls are concerned that is the system prompting you, not me, and they do cost more money, I prefer text but in some cases a phone call is required. If I don’t answer right away or quickly in conversation I am helping another customer or have stepped out for a moment and will respond as soon as I can. Ok lets get started!

Did you install a new bcm?

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Customer reply replied 8 months ago
No, I changed starter, ignition coil, 1st cylinder, and front and rear motor mounts.
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

oh those are a blast, so it sounds like you have a loose connection somewhere or a power supply problem, have you double checked the connections and checked all fuses ?

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Customer reply replied 8 months ago
I just did all of that. Now, I was having door/ gate issues before, but not completely non functional. I had the codes read and it said a wheel speed sensor wasn’t working, but I don’t know why it would affect the door/ gate...
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

was there any other codes?

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Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

do you get any operation out of the cluster?

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Customer reply replied 8 months ago
No other codes, and nothing out of the cluster. But that had been going on/ off for a bit, but the speedometer and tach were at least functional, even if they didn’t light up. Now I get nothing
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

ok we will have to check power and ground at each component, do you have a multimeter for testing?

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Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

https://www.dropbox.com/s/bkrm54urmwbbpk5/doc8.docx?dl=0

OK so the first 3 highlighted are power with key on engine off and 4th is ground

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Customer reply replied 8 months ago
I just found out my local auto parts place can test bcm.... should I do that first?
Customer reply replied 8 months ago
where am i testing? The bcm harnesses? The bcm itself?
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

thats a good idea and that was the pinout for the cluster harness at the cluster

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Customer reply replied 8 months ago
Does BCM control the speedometer and cluster?
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

It controls certain function within the cluster but it wouldnt prevent it from turning on though,

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Customer reply replied 8 months ago
Ok. Cause I read I can solder the transistor back on the board and it’s a common problem w these vans
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

that could be an issue as well

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Customer reply replied 8 months ago
if the bcm tests ok, it would be the harness/wiring or the wheel speed sensor for the speedometer/ tach? And is there a rest/ I put test I can preform manually?
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

even if the bcm is good or bad we need to check power and ground at the cluster, then we will know what do to next, the only reset you can do without a scanner is just removing the battery cables and touching them together for 1 min wait 15 more and then reinstall,

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Customer reply replied 8 months ago
Ok, so I’m testing 7, 30, 31 and 32 is ground?
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

correct

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Customer reply replied 8 months ago
Is there any other way? My multimeter seems to not be working properly....
Nissan Mechanic: Mechanic01, ASE Certified Technician replied 8 months ago

test light

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Nissan Mechanic: Mechanic01, ASE Certified Technician replied 7 months ago

hows it coming?

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