Speedo Problems

rebroker7

Active Member
Have a 2007 K9 when I start it the speedo needle jumps to about 60 mph, than drops to zero. The needle & odometer do not move when riding. All other functions ok. Looked at connection and looked ok.

Looked inside speedo and seems ok. Any suggestions appreciated. Is it just time of a new one?:)
 

07bigdog

07BIGDOG
Did you try shutting the bike off and restarting it and then see if it works. Sometimes these speedos act up. Might also started working intermintantly, so i installed a new Medallion speedo and haven't had any problems since. Dakota digital is another option if you can't get yours working properely.
 

Jwooky

Well-Known Member
Unfortunately Medalalions are no longer available. Derrick/Donna has a few but they want Krazy $$ for them.
 

Nukeranger

Nukeranger
Your battery voltage drops too low when starting and the EHC drops out the speedo operation. The initial sweep is normal and a good sign. Try riding down the street to warm up the engine and charge up the battery a bit from your initial start. Turn your bike off and restart. If the speedo works, then it is your battery voltage dropping too low on initial start. There was a software upgrade by big dog to do a second sweep of your speedo after starting and it appears you didn't get this. Don't worry because not many people did. I went with Dakota Digital to solve my speedo issue and get a more accurate speed.
 
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woodbutcher

Mr. Old Fart member #145
Staff member
Your battery voltage drops too low when starting and the EHC drops out the speedo operation. The initial sweep is normal and a good sign. Try riding down the street to warm up the engine and charge up the battery a bit from your initial start. Turn your bike off and restart. If the speedo works, then it is your battery voltage dropping too low on initial start. There was a software upgrade by big dog to do a second sweep of your speedo after starting and it appears you didn't get this. Don't worry because not many people did. I went with Dakota Digital to solve my speedo issue and get a more accurate speed.
AGREE with everything said. :2thumbs: mine does the same thing, just learned to live with it.
 

BigDogBro1

Made in the USA
Have a 2007 K9 when I start it the speedo needle jumps to about 60 mph, than drops to zero. The needle & odometer do not move when riding. All other functions ok. Looked at connection and looked ok.

Looked inside speedo and seems ok. Any suggestions appreciated. Is it just time of a new one?:)
The speedo could be fine and the sender or wires could be the problem. When you power ON you should see the calibration number "4xxxx"? in the odometer window and the needle should swing as a RESET. Some program updated EHC's will RESET the speedo again (needle sweep) when you press the START button.
 
Then the one that I have must have been messed with...because it says auto meter inside. I replaced with an auto meter.
Now I must admit that it is completely possible that BD had Autometer knock off the Medallion, as BD was doing that extensively towards the end, but Medallion was making them in the beginning. That could be why they won't service them or repair them now.
 

francoblay1

The Spaniard
Your battery voltage drops too low when starting and the EHC drops out the speedo operation. The initial sweep is normal and a good sign. Try riding down the street to warm up the engine and charge up the battery a bit from your initial start. Turn your bike off and restart. If the speedo works, then it is your battery voltage dropping too low on initial start. There was a software upgrade by big dog to do a second sweep of your speedo after starting and it appears you didn't get this. Don't worry because not many people did. I went with Dakota Digital to solve my speedo issue and get a more accurate speed.
AGREE with everything said. :2thumbs: mine does the same thing, just learned to live with it.
X3, and mine is more strange... the sweep goes backwards (past below 0) , then up to 30 and then stops at 0 :confused:

Then while riding, if I go easy on the revs it works fine, but if I go very fast up on the revs it gets stuck at whatever speed I reached before easing off. Oh well... :loony:

:cheers:
 

BigDogBro1

Made in the USA
X3, and mine is more strange... the sweep goes backwards (past below 0) , then up to 30 and then stops at 0 :confused:

Then while riding, if I go easy on the revs it works fine, but if I go very fast up on the revs it gets stuck at whatever speed I reached before easing off. Oh well... :loony:

:cheers:
Sounds like a loose wire at higher vibration/RPM. Any speedo wire signal/power/ground that has a poor solder joint or plug connection can act strange. These speedos are stepper motor driven instead of the old electric coil type. The problem could also be the sensor being sensitive to vibration of providing poor signal as it gets older.
 

rebroker7

Active Member
Thanks to all for the ideas. I tried a number of them but still same. So, will be borrowing another working speed and attach it to see if the problem is the in the speedometer vs the sending unit/wires.

I'll post back how it turns out.
 
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