DTC b2223
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Stellar HDF Member
Joined: Feb 2008
Posts: 2,336
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From: Southern Maryland
DTC b2223
I was coming back from a 60 mile ride yesterday in 87° weather when my electrical systems lamp came on. Before too long, it went back off.
When I got home, I ran diagnostics and the BCM threw code b2223 with p/n 69994-12b as the affected part..
However code b2223 shows "Rear brake switch shorted low (light on).
Also my cruise control would come on but not engage. which leads me to believe the shorted switch.
I went out this AM and the rear brake light is working normally.
Could this be as simple as replacing the FOB battery, or could it be the rear brake switch that shorts out when hot, or could it be p/n 69994-12b Body Control Module??
Any opinions? Our service dept is backed up, and right now it's A799-No trouble found.
When I got home, I ran diagnostics and the BCM threw code b2223 with p/n 69994-12b as the affected part..
However code b2223 shows "Rear brake switch shorted low (light on).
Also my cruise control would come on but not engage. which leads me to believe the shorted switch.
I went out this AM and the rear brake light is working normally.
Could this be as simple as replacing the FOB battery, or could it be the rear brake switch that shorts out when hot, or could it be p/n 69994-12b Body Control Module??
Any opinions? Our service dept is backed up, and right now it's A799-No trouble found.
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Stellar HDF Member
Joined: Feb 2008
Posts: 2,336
Likes: 415
From: Southern Maryland
After my first post on this subject, and all the responses received, I replaced the FOB battery.
I went on another ride today, 91° and turned the cruise control on, and it engaged. Rode around, stop and go traffic, very hot, and the red electrical systems light came on again. Tried to engage the cruise, would not engage. So the FOB battery was not the problem.
I pulled over under the shade of a tree, and my brake light was on constantly. That explains why the cruise control would not engage.
I am back home not, and will let it cool off, and look at the rear brake switch.
I might also drain some fluid out of the rear brakes to see if that helps. I had the dealer flush the brakes in January and was thinking if they put too much fluid in or maybe got air in the system, when it gets hot and expands, triggers the brake switch.
I went on another ride today, 91° and turned the cruise control on, and it engaged. Rode around, stop and go traffic, very hot, and the red electrical systems light came on again. Tried to engage the cruise, would not engage. So the FOB battery was not the problem.
I pulled over under the shade of a tree, and my brake light was on constantly. That explains why the cruise control would not engage.
I am back home not, and will let it cool off, and look at the rear brake switch.
I might also drain some fluid out of the rear brakes to see if that helps. I had the dealer flush the brakes in January and was thinking if they put too much fluid in or maybe got air in the system, when it gets hot and expands, triggers the brake switch.
Seasoned HDF Member
Joined: Apr 2015
Posts: 10,032
Likes: 5,305
I had looked up the DTC in my electrical diagnostic manual and I had even drafted a response where I quoted what the manual had to say. Then, I was going to offer my suggestions for what you should try, but I ended up deleting it.
Now that youve added new information about the brake light being stuck on, when before it was working properly, and that you think there is air in the brake lines, I know nothing I was going to suggest would have helped.
It sounds like youve got a handle on things. Good luck and I hope you get it worked out.
Now that youve added new information about the brake light being stuck on, when before it was working properly, and that you think there is air in the brake lines, I know nothing I was going to suggest would have helped.
It sounds like youve got a handle on things. Good luck and I hope you get it worked out.
Road Captain
Joined: Jun 2013
Posts: 671
Likes: 168
From: Ontario, Canada
After my first post on this subject, and all the responses received, I replaced the FOB battery.
I went on another ride today, 91° and turned the cruise control on, and it engaged. Rode around, stop and go traffic, very hot, and the red electrical systems light came on again. Tried to engage the cruise, would not engage. So the FOB battery was not the problem.
I pulled over under the shade of a tree, and my brake light was on constantly. That explains why the cruise control would not engage.
I am back home not, and will let it cool off, and look at the rear brake switch.
I might also drain some fluid out of the rear brakes to see if that helps. I had the dealer flush the brakes in January and was thinking if they put too much fluid in or maybe got air in the system, when it gets hot and expands, triggers the brake switch.
I went on another ride today, 91° and turned the cruise control on, and it engaged. Rode around, stop and go traffic, very hot, and the red electrical systems light came on again. Tried to engage the cruise, would not engage. So the FOB battery was not the problem.
I pulled over under the shade of a tree, and my brake light was on constantly. That explains why the cruise control would not engage.
I am back home not, and will let it cool off, and look at the rear brake switch.
I might also drain some fluid out of the rear brakes to see if that helps. I had the dealer flush the brakes in January and was thinking if they put too much fluid in or maybe got air in the system, when it gets hot and expands, triggers the brake switch.
It's more likely that the switch is faulty and only acts up hot but verifying the fluid level is a good basic first step.
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Stellar HDF Member
Joined: Feb 2008
Posts: 2,336
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From: Southern Maryland
Rear brake light switch
Never mind, looked it up on parts diagram. It looks ok, and looks like a bitch to get out.
Last edited by Sandcrab; Jul 13, 2021 at 11:48 AM.
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Thread Starter
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Stellar HDF Member
Joined: Feb 2008
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From: Southern Maryland
I had looked up the DTC in my electrical diagnostic manual and I had even drafted a response where I quoted what the manual had to say. Then, I was going to offer my suggestions for what you should try, but I ended up deleting it.
Now that youve added new information about the brake light being stuck on, when before it was working properly, and that you think there is air in the brake lines, I know nothing I was going to suggest would have helped.
It sounds like youve got a handle on things. Good luck and I hope you get it worked out.
Now that youve added new information about the brake light being stuck on, when before it was working properly, and that you think there is air in the brake lines, I know nothing I was going to suggest would have helped.
It sounds like youve got a handle on things. Good luck and I hope you get it worked out.
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Thread Starter
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Stellar HDF Member
Joined: Feb 2008
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From: Southern Maryland
OK, maybe not the weather, but when it is cold, it works fine. After riding a while, the brake light stays on. After it cools off, it works fine again. So maybe not weather related but definitely heat related.
Road Master
Joined: Jan 2020
Posts: 934
Likes: 1,050
From: So Calif
It is not air in the system, your pedal would be mush. It is not overfilled, just look at the sight glass on the side of the master cylinder.
The brake light switch is probably sticking when it gets hot, and will need replacing. Next time the lights stay on, unplug it to make sure it is the problem, and not the hand control. It will be HOT down there.
The brake light switch is probably sticking when it gets hot, and will need replacing. Next time the lights stay on, unplug it to make sure it is the problem, and not the hand control. It will be HOT down there.
