Speedo issue
Seasoned HDF Member
Joined: Nov 2006
Posts: 21,051
Likes: 19,180
From: The Wasteland
At 65mph, with cruise control on, the check engine light came on, the 6th gear light went out/came on/went out/ came on, and cruise control turned off. Then, the speedo needle jumped to 140 mph, the to 0, then to 60 mph. It did this many times for several miles. Whiskey Tango Foxtrot, over?
Grand HDF Member
Joined: Jan 2012
Posts: 4,456
Likes: 2,860
From: Oklahoma
How long since a transmission lube change, a drain and refill might get rid of most of the particles floating around.
Seasoned HDF Member
Joined: Nov 2006
Posts: 21,051
Likes: 19,180
From: The Wasteland
A drain and fill will get rid of the stuff that's suspended and flowing around but the stuff already on the sensor is stuck there on the magnet and will not come out unless you pull the sensor and wipe it off. Since the sensor is not a regular maintenance item most folks wont ever clean it unless there's an issue.
Stage II
Joined: Jun 2018
Posts: 2
Likes: 0
From: Colgate, WI
New here, this is the topic I'm chasing at the moment. 2001 FLHTCI, 18,000 mi. Intermittent speedometer. Have done some research, cleaned the sensor, actually have a new sensor not yet installed. My hesitation to install because.... this only fails intermittently AND... when it does fail, if I lock my throttle and move the wire harness between the tank and the fork/fairing up and down, it will come back on and off on and off as I move the wire harness then stays on. This happens at least once per day riding. Based on this I suspect the wiring harness where I can move it and get the problem to come and go. I think it's the wiring harness.. but... how to figure out what wire is causing the problem. HOPEFULLY, someone will tell me they had the exact same problem and replacing the sensor solved it, which is a vastly easier problem to fix. Thoughts? thank you, Mike
Grand HDF Member
Joined: Jan 2012
Posts: 4,456
Likes: 2,860
From: Oklahoma
" A drain and fill will get rid of the stuff that's suspended and flowing around but the stuff already on the sensor is stuck there on the magnet and will not come out unless you pull the sensor and wipe it off. "
I agree, the standard answer has been to remove the sensor, clean it, reinstall it and if that fixes the problem, that's good. BUT if the problem repeats, replace the sensor. If there is old fluid with a generous supply of metal particles, even the new sensor will gunk up soon enough without the fluid change. Clean the sensor AND change the fluid if it has been a while. Then if the sensor messes up again, the replacement makes sense.
I agree, the standard answer has been to remove the sensor, clean it, reinstall it and if that fixes the problem, that's good. BUT if the problem repeats, replace the sensor. If there is old fluid with a generous supply of metal particles, even the new sensor will gunk up soon enough without the fluid change. Clean the sensor AND change the fluid if it has been a while. Then if the sensor messes up again, the replacement makes sense.
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harleyheaven
Softail Parts
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Jan 4, 2010 11:53 AM
