Electrical Issues
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Electrical Issues
I have been doing a lot of research lately to try and figure out an issue with my 2012 g 37. Im started to think its something with the BCM as i have needed a jump twice in the last month or so. Along with 2 of my windows (passenger front, rear driver) stuck 2 inches from the top. no control of any windows but the driver. On my driver door control switches the only things that work are the driver window switch and my mirror adjustment ****. Nothing from the door lock/unlock, window lock/unlock and other 3 window controls.. Please help
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+1 to test the battery.
If that checks out, check all of the fuses under the driver's dash and in the engine compartment to confirm none are blown that may feed the BCM.
If fuses are all good, pull the carpet back on the passenger side to check the BCM. If you have a sunroof, chances are the sunroof drains are either clogged or leaking at the firewall grommet, and they can essentially flood the BCM with water. Most of the time if this happens it results in a no-crank no-start situation, but water damage to electronics can do interesting things.
If that checks out, check all of the fuses under the driver's dash and in the engine compartment to confirm none are blown that may feed the BCM.
If fuses are all good, pull the carpet back on the passenger side to check the BCM. If you have a sunroof, chances are the sunroof drains are either clogged or leaking at the firewall grommet, and they can essentially flood the BCM with water. Most of the time if this happens it results in a no-crank no-start situation, but water damage to electronics can do interesting things.
Thread Starter
Registered Member
Joined: Oct 2020
Posts: 3
Likes: 0
+1 to test the battery.
If that checks out, check all of the fuses under the driver's dash and in the engine compartment to confirm none are blown that may feed the BCM.
If fuses are all good, pull the carpet back on the passenger side to check the BCM. If you have a sunroof, chances are the sunroof drains are either clogged or leaking at the firewall grommet, and they can essentially flood the BCM with water. Most of the time if this happens it results in a no-crank no-start situation, but water damage to electronics can do interesting things.
If that checks out, check all of the fuses under the driver's dash and in the engine compartment to confirm none are blown that may feed the BCM.
If fuses are all good, pull the carpet back on the passenger side to check the BCM. If you have a sunroof, chances are the sunroof drains are either clogged or leaking at the firewall grommet, and they can essentially flood the BCM with water. Most of the time if this happens it results in a no-crank no-start situation, but water damage to electronics can do interesting things.
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Joined: Sep 2012
Posts: 1,638
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From: NJ
I have been doing a lot of research lately to try and figure out an issue with my 2012 g 37. Im started to think its something with the BCM as i have needed a jump twice in the last month or so. Along with 2 of my windows (passenger front, rear driver) stuck 2 inches from the top. no control of any windows but the driver. On my driver door control switches the only things that work are the driver window switch and my mirror adjustment ****. Nothing from the door lock/unlock, window lock/unlock and other 3 window controls.. Please help
https://www.nicoclub.com/service-man...n/2012/PWC.pdf
Use your multi meter to test the wiring harness connections in the BCM
Is there any evidence of water or corrosion?
Good luck
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