Cruise Control Code 122
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Joined: Oct 2013
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From: Wisconsin
Cruise Control Code 122
I have OEM cruise on my 2002 RK Classic. Worked perfectly. I changed out the front brake lines, pads and bars this winter. No issues there. When checking things out today the cruise will not come on. I ran the diagnostics and it returned Code 122 - "Front or rear brake applied".
I presume this is stemming from front brake work somehow. Any suggestions on how to proceed?
Thanks!
I presume this is stemming from front brake work somehow. Any suggestions on how to proceed?
Thanks!
Stellar HDF Member
Joined: Sep 2013
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From: USA
Are you sure that the brake light is not on? It's not uncommon for the front brake light switch to get damaged or misaligned when the switches are removed from the bars. AFAIK the only way that the cruise control would know that the brakes are applied is when the brake light is lit.
From the 2006 Electrical Diag Manual
Code 122 Application of Front or Rear Brakes NOTE May require inspection of brake levers or front brake light switch mounting Follow the chart above.
Last edited by 14GuineaPig; Feb 4, 2018 at 07:52 PM.
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From: Wisconsin
Thank you
Check the simple things first...yes, I had the brake lever assembly off while swapping the bars. It easily could have become misaligned somehow.
I did not check the tail light although a more reasonable person would have thought to do so. That's why forums are great.
The diagnosis diagram is cool, I'll have to track it down. Thank you.
I did not check the tail light although a more reasonable person would have thought to do so. That's why forums are great.
The diagnosis diagram is cool, I'll have to track it down. Thank you.
Grand HDF Member
Joined: Jan 2012
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From: Oklahoma
If pushing the front brake lever hard against the forward stop turns off the brake light, you probably broke the little plastic button off the front brake light switch. Just about THE MOST COMMON cause of cruise control failure, almost always following a grip or handle bar change. If you have throttle cables, there is a roll-off switch somewhere near the gas tank. Others say to pull the plug off that switch and try the cruise again. If it works, that is your problem. The roll-off is only one of about 4 or 5 ways to turn off the cruise, I never use that feature as it automatically causes a sudden lurch to closed throttle. You would still have the: front brake, rear brake, pulling in the clutch lever, turning off the cruise on the left side switch, and killing the ignition. Pulling the right side cruise switch to coast, or slow down position should disengage the cruise long enough to figure out some other way if needed. I still vote for the front brake lite switch as the most likely culprit. There are "shade tree" fixes not involving switch replacement if that is the problem.
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From: Wisconsin
This gets deeper... My brake light is not on inappropriately, and it functions normally using the front or rear brake. I can hear the relay clicking normally. I rechecked my connections at the Deutsch fittings, they are correct.
I had previously pulled one wire from the throttle cable switch, the cruise wasn't working but then did after that.
It's like the 122 code is stuck in the cruise controls brain. Can't imagine how, I had the battery disconnected per the service manual when I do work... Can I clear these codes? Can the dealer?
As I type this I'm remembering a trick us Jaguar XK8 guys do...disconnect both battery leads and touch them together for a few minutes. It helps clear memory we think.
It's showing like heck here now but what it may need is a good ride to get it "thinking" again.
Advice and suggestions are always welcome!
I had previously pulled one wire from the throttle cable switch, the cruise wasn't working but then did after that.
It's like the 122 code is stuck in the cruise controls brain. Can't imagine how, I had the battery disconnected per the service manual when I do work... Can I clear these codes? Can the dealer?
As I type this I'm remembering a trick us Jaguar XK8 guys do...disconnect both battery leads and touch them together for a few minutes. It helps clear memory we think.
It's showing like heck here now but what it may need is a good ride to get it "thinking" again.
Advice and suggestions are always welcome!
Elite HDF Member
Joined: May 2007
Posts: 4,452
Likes: 798
From: Bear Flag, lower end
This gets deeper... My brake light is not on inappropriately, and it functions normally using the front or rear brake. I can hear the relay clicking normally. I rechecked my connections at the Deutsch fittings, they are correct.
I had previously pulled one wire from the throttle cable switch, the cruise wasn't working but then did after that.
It's like the 122 code is stuck in the cruise controls brain. Can't imagine how, I had the battery disconnected per the service manual when I do work... Can I clear these codes? Can the dealer?
As I type this I'm remembering a trick us Jaguar XK8 guys do...disconnect both battery leads and touch them together for a few minutes. It helps clear memory we think.
It's showing like heck here now but what it may need is a good ride to get it "thinking" again.
Advice and suggestions are always welcome!
I had previously pulled one wire from the throttle cable switch, the cruise wasn't working but then did after that.
It's like the 122 code is stuck in the cruise controls brain. Can't imagine how, I had the battery disconnected per the service manual when I do work... Can I clear these codes? Can the dealer?
As I type this I'm remembering a trick us Jaguar XK8 guys do...disconnect both battery leads and touch them together for a few minutes. It helps clear memory we think.
It's showing like heck here now but what it may need is a good ride to get it "thinking" again.
Advice and suggestions are always welcome!
Last edited by hbsoldier3; Feb 5, 2018 at 07:49 PM.
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Joined: Oct 2013
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From: Wisconsin
Still hunting for a cause and resolution. Visited with a HD Tech today, his experience - like many here - was to examine the front brake switch and assembly. I took it apart, verified the correct switch operation and wiring. All is perfect there.
I learned that on an '02 the dealer must clear codes but Cruise Control codes aren't like engine management codes and aren't "cleared". They are just present until the fault is resolved, then they disappear.
I got the throw-parts-at-it solution - try a new cruise control module - and the we-don't-know solution - just ride it and see if it starts working. Not much help, really.
There's not many more places to look, I may just wait until riding season here. I will, though, go through the diagnostic chart from 14GuineaPig. Thanks.
I learned that on an '02 the dealer must clear codes but Cruise Control codes aren't like engine management codes and aren't "cleared". They are just present until the fault is resolved, then they disappear.
I got the throw-parts-at-it solution - try a new cruise control module - and the we-don't-know solution - just ride it and see if it starts working. Not much help, really.
There's not many more places to look, I may just wait until riding season here. I will, though, go through the diagnostic chart from 14GuineaPig. Thanks.
Elite HDF Member
Joined: May 2007
Posts: 4,452
Likes: 798
From: Bear Flag, lower end
Still hunting for a cause and resolution. Visited with a HD Tech today, his experience - like many here - was to examine the front brake switch and assembly. I took it apart, verified the correct switch operation and wiring. All is perfect there.
I learned that on an '02 the dealer must clear codes but Cruise Control codes aren't like engine management codes and aren't "cleared". They are just present until the fault is resolved, then they disappear.
I got the throw-parts-at-it solution - try a new cruise control module - and the we-don't-know solution - just ride it and see if it starts working. Not much help, really.
There's not many more places to look, I may just wait until riding season here. I will, though, go through the diagnostic chart from 14GuineaPig. Thanks.
I learned that on an '02 the dealer must clear codes but Cruise Control codes aren't like engine management codes and aren't "cleared". They are just present until the fault is resolved, then they disappear.
I got the throw-parts-at-it solution - try a new cruise control module - and the we-don't-know solution - just ride it and see if it starts working. Not much help, really.
There's not many more places to look, I may just wait until riding season here. I will, though, go through the diagnostic chart from 14GuineaPig. Thanks.