Dead speedometer and odometer on 1300, tach is good

Hi all,
I think I have an idea but just want to get the collective opinion first if I may.

Rolled out of the garage this morning for the morning commute. A half mile from the house I noticed my speedometer is dead, not moving a bit, odometer and trip meter are not moving either. Gas gauge, tachometer and other instrumentation is working fine.

I just replaced the rear spring at Gary's tech event, (thank you again Gary!) something beyond my tech capacity. I am guessing I broke a wire or dismounted a connector on the back or side of the engine? I don't have access to the schematics from work.

Anyone? Anyone?

There were a lot of wires that were moved a bit when we took the front seat adjuster plate off to lift the top tank enough to get to the top shock bolt. Something there maybe? we did not unplug anything, at least not on purpose, I think.

Question, does the speedometer, and trip meter get signal from a rear wheel speed sensor? Maybe like the abs system?

Wiring diagram
https://www.st-owners.com/forums/showthread.php?90873-ST1300-Wiring-Schematic&p=1102948&viewfull=1#post1102948

There is a speed sensor on the lower rear right side of the engine that controls the speedo look there its easy to replace if need be.

SteveST1300 said:

There is a speed sensor on the lower rear right side of the engine that controls the speedo look there its easy to replace if need be.

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Any chance we knocked that loose, or even off when removing the rear wheel & shock?

st1300r said:

Wiring diagram
https://www.st-owners.com/forums/showthread.php?90873-ST1300-Wiring-Schematic&p=1102948&viewfull=1#post1102948

Click to expand...

Thanks Carl, but security won't let me connect to google docs.

SteveST1300 said:

There is a speed sensor on the lower rear right side of the engine

Click to expand...

Can I get to this without pulling the rear wheel off?

GreenZR said:

trip meter get signal from a rear wheel speed sensor?

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I think they pull it from the VSS unit that I believe is located on the back side of the engine, probably by the transmission output. I know we didn't intentionally unplug anything, and we didn't need to unplug anything, but I did have my fat head and fingers stuffed up inside there. Plus as much as I moved that shock around trying to flip it.


Hey, it's a bonus, now I can honestly say "No officer I do not know how fast I was going."
And I will never have to change oil again based on mileage. :-D

You may be able to get to it. Maybe a wire broke off. I'm trying to post pics but win10 is winning the fight against my laptop touch pad. Please hold. You're right that's were it's located.

T_C you dont need to pull the wheel its a bit awkward to get to but I changed mine without removing anything else keep in mind you may get some oil out of it when you remove it but its not alot.

SteveST1300 said:

T_C you dont need to pull the wheel its a bit awkward to get to

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Thanks Steve. I don't think it's a bad sender I figure we just knocked a connector off or maybe broke a wire. Just wondering if I the wire's are well protected and if the connectors are available to access. To get the shock back in we pushed and pulled quite a bit, wiggled, waggled and even pried just a touch.

st1300r said:

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Thanks Carl, I'm gonna go take a walk to the parking lot.

Were you under the bike when I did my shock it went in from the side didn't need to do much it just kind of whent in hardest part was not dropping the top bolt when trying to get it back together. What type of shock did you install?

SteveST1300 said:

Were you under the bike when I did my shock it went in from the side didn't need to do much it just kind of whent in hardest part was not dropping the top bolt when trying to get it back together. What type of shock did you install?

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Stock shock, just put a 1300# spring on it. I think Gary did a good job of sliding it back in from the side, but then I flustered it all up and pulled it from below to spin it 180?. Our biggest hang-up was getting the nut back on the top bolt. Then once on I couldn't get a wrench to sit solidly on it so Gary could torque it.

That sensor does go bad from time to time. A member here had the same problem. I replaced the sensor for him and problem solved. You do not need to remove anything to replace it. You could pull the black lower plastic to give you a better view. Just not much room to work, but can be done. A little oil will leak out when you pull the sensor out as another post stated.

Thanks Carl, just looked at the bike in the parking lot.. without puling some plastic I can't see squat but red. Work schedule is full, so I won't be putting any miles on the bike till this weekend. I will continue to use it for the daily commute. ;-)

This was getting to the shock. Also changed the TPMS sending unit in the rear tire while it was off.



This was the stock shock with the new spring ready to put back in place.



Gary.

T_C said:

Thanks Carl, just looked at the bike in the parking lot.. without puling some plastic I can't see squat but red. Work schedule is full, so I won't be putting any miles on the bike till this weekend. I will continue to use it for the daily commute. ;-)

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Any luck with resolving this?? Really STumped!

Gary.

How hard is it to replace that spring and where did you pick it up from?

I've got a almost brand new cop shock (409 miles) sitting in my parts bin and would like to put a heavier spring on it and then install it on my 2010!

And then I just looked at the parts lists on Partzilla and the cop shock is different number (and costs about $30 more) than the regular shock....hum. I wonder if they already have a heavier spring on it?