Speedometer w/ digital readout...BROKEN NOT WORKING HELP!!!


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jhbates2000
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Speedometer w/ digital readout...BROKEN NOT WORKING HELP!!!

Postby jhbates2000 » Tue Sep 03, 2013 10:53 pm



ok so I am driving down the road at about 55 mph and my speedometer stops registering. I read an article on here of how to replace the speedo cable but apparently this will not apply to me since I do not have the regular type of speedometer. I he the digital dash. So does anyone have any ideas on how to correct this problem?



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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Wed Sep 04, 2013 8:36 am

Only in my mind...And your gonna need a volt meter...not a test light a real volt meter...
I've never seen this part first hand but I can describe it by it's function....
At the front left wheel axle,inside the lower part of the fork,wedged between it and the wheel is a part....It has a electrical connection to the speedometer...
It's purpose in life is to provide electrical pulses as the wheel is rotated....
These pulses are translated to MPH.....Pretty cool....
On the 3 wires that this thing has....one is ground,one is near 5 volts DC with the key on and the third should switch from near 5 volts to near zero volts as the wheel it rotated....

Most of the reading I've done refers to a mechanical problem in the little magic box....All the voltages are OK but it won't pulse with the wheel....One fine tech decided to disassemble his and found a 'loose screw' that retained a magnet...being loose,the magnet didn't rotate with the wheel and thus did not trigger the electronic part inside....A clean,grease and secure of the loose parts restored his....
Another tech found the volts missing..All of them....his unit simply was unplugged....Go figure. :D

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby jhbates2000 » Wed Sep 04, 2013 9:31 am

Thanks for the reply..hopfully mine is just un plugged.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Wed Sep 04, 2013 10:02 am

Check it out and tell us what you find. :geek:
Pictures are nice to look at too.. :)

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby jhbates2000 » Thu Sep 05, 2013 2:28 am

So here is what I found out...the small black box that attaches to the speedo gear that fits on the front axel seemed to be in good working order. So I removed the front wheel to sheck the speedo gear inside the assy that is on the front axel. Once I got this apart I saw that the plastic speedo gear that is inside has/had two small ears protruding off of it that turns the gear which registers through the black box when the front wheel is turning. Fortunately there wasn't a million little pieces the two ears just broke off. I took out the plastic gear and took it in the house to clean it up. I scrubbed it with Dawn dishsoap and got all the grease off of it. I used so Gorrilla Glue to glue the pieces back into place. This was about 3pm on the 4th. It says 1-2 hours on the bottle to cure completely...So to be on the safe side I left it sitting in the kitch windon sill while we went to church last evening and while I am at work tonight. I am betting it will be set up by the time I get off work at am on the 5th. I am going to get another one in case this does not provide the results that I want. There is an old guy in my city that has a "goldwing graveyard" of sorts behind his house in a big building...I am gonna try and find another one just to be safe. I do not have any pics (didn't think to take any)...but I will take some in the morning before I re-install everything and put them on here tomorrow nite.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Thu Sep 05, 2013 6:49 am

Cool beans.See I told you something was broke. :D
Keep us up to date and by all means,post pictures.Ive never seen one of these things.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby BikerBuck » Thu Sep 05, 2013 3:28 pm

jhbates, good luck on your glue job. If it doesn't hold, all gl1100's use the same speedo gear. I had the same problem a year ago and was able to find a new gear at a parts house. Mine self destructed internally and I figured any used one was also 30 yrs. old

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby roadwanderer2 » Sun Sep 08, 2013 7:35 pm

hey guys....im having almost the same problem with my '83 aspy. what im getting is a "0" on my mph readout no matter what speed im going, and my trip meter isnt working, AND my mechanical odometer isnt registering either even after doing a 30 mile ride. do i have the same problem as jhbates is having or is it something else..... this started yesterday and the speed display was going crazy, it was registering erraticaly between 0 and 54mph even when i was going around 25mph. this happened all of a sudden, no warning, it just went crazy then stopped working with a "0" on the speed display.

stuart, a.k.a. roadwanderer2.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby jhbates2000 » Sun Sep 08, 2013 8:22 pm

Sounds to me like the plaztic gear is broken completely now. I bet it was partially broken and now its just done.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby roadwanderer2 » Mon Sep 09, 2013 5:23 am

good morning jhbates:

lol, i like that finishing line....."now its just done" lol. well, i guess i'll be taking the front wheel off and takeing everything on it apart to find out huh. i need to get this fixed a.s.a.p. because as much as i ride this bike, i rack up the mileage pretty quick. ive had this bike for one month as of today, and already ive put over 2300 miles on it, also this bike is so fast, i need my speedo working. im not really good at judging my mph with only the tac working, and around here, we have 2 school zones in my neighborhood, (15mph), and many 35mph speed traps. one area, the speed limit is 55mph, then it drops down to 35mph within a 100 yards and every day theres a police car with his radar set up just inside the 35mph zone to catch ya. very well known area for handing out speeding tickets so one has to be very alert when it comes to how fast they are going. you know, one of those little "one horse towns" with only 2 police officers and a "main street" thats about a mile long. the whole town has only 800 people living in it lol.

stuart, a.k.a. roadwanderer2.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Mon Sep 09, 2013 7:21 am

Might I suggest that after the repairs,you borrow a GPS of some sort to check your spedo.
My wings were all off a bit.
Enough to get a ticket in a school zone.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby roadwanderer2 » Mon Sep 09, 2013 11:37 am

hey virgilmoble: so i took the front wheel off, (pain in the a** i might add), took the speedo gear housing off, but before i did that, i rotated it inside the wheel hub.......i could see the tip of the cable moving, took the gearbox collar out of the wheel hub, all the ears that are supposed to be on them are there, nothing is broken, cleaned it out and put fresh lube inside the gearbox and the axle hub and put it all back together making sure i tourqued everything down according to book specs, turned the ign. key on, got all the lights on the dash working, spun the front wheel and nothing....still reading a "0" on my mph LED readout. now im stumped, i dont know where to look at next. any ideas gentlemen?

stuart, a.k.a. roadwanderer2.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Mon Sep 09, 2013 11:47 am

Way back up in the post,I reference 2 parts to the spedo system.Both mechanical and electronic.
Either one can cause a problem.If the drive is OK,look at the volts.If the 5 volts are there but no pulses,look into the magic box for a loose screw that secures a magnet.
If there are no volts at all,look for the plug being at fault.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby roadwanderer2 » Mon Sep 09, 2013 12:53 pm

ok, i guess my next step is to take the "magic box" apart and see what i find inside it. hopefuly there is where the problem will be. if its something else, i'll take it to the bike shop and let them figure it out. i'll keep ya'll posted as to what i find out.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Mon Sep 09, 2013 1:01 pm

Like I said,I've never seen one so take pictures please.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Mon Sep 09, 2013 1:06 pm

As I can only guess,there should be a magnet attached to some kind of shaft that turns with the wheel.As the magnet rotates,it triggers a electronic part(hall effect transistor) that outputs a pulse for the spedo.
Clear as mud.? :lol:

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby roadwanderer2 » Mon Sep 09, 2013 4:50 pm

ok, i took the "magic box" apart, the magnet inside is in good condition, clean, no breaks on it,theres a small 4mm nut that holds the magnet into the housing, that was ok, stuck a small flat head screw driver in the end that goes into the speedo gear housing to see if the magnet was working, it rotates perfectly. the other end up under the fairing WAS disconnected, (probly when i pulled the caliper off the fork), i pluged it back in, put it all back together and took it for a ride around the block, and still nothing, its still not working. :? next step is letting the bike shop test the electronics of it as i dont have a volt meter to check it with. i have now have to think that maybe the speed sensor is faulty or something else is wrong, or maybe i might have to replace the "magic box" that bolts to the lower fork :(

stuart, a.k.a. roadwanderer2.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Mon Sep 09, 2013 5:21 pm

I've been meaning to talk to you bout that.
First,the spedo pulse generator is no longer avaiable new.Good luck even finding one used.
Expect one to be mucho bucks.
Second,a "shop" cannot test it unless its on the bike and usually has a fee too.
For much less than the minimum fee,a cheap ( under $10) meter can be had.Even at Wal mart.A simple analog volt meter(not digital) from the auto section.
The test is simple.5 volts steady,ground and 5 volts pulse as the wheel is turned.
Did this problem start right after you 'did' the caliper work.?
It's possible a wire was damaged.There pretty small.
You obviously eliminated all the mechanical stuff.All that's left is the wires.
If it quit before you worked on it,its possible the electronic part is bad.Doubtful tho.Its usually a broken wire.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby roadwanderer2 » Mon Sep 09, 2013 5:47 pm

i installed front brake pads on it 2 weeks ago and its been working perfectly all this time up untill 2 days ago. the "shop" im talking about is an authorized honda motorcycle dealership, and i know about the fee, ($85.00 per hour) which in my opinion is outrageous, and your right about finding a new or even a used one. ive been searching ebay and craigslist for one and cant find it anywhere. im even thinking about buying a "parts bike" so i have numerous parts to use. maybe i can get a cheap volt meter and see what it reads on the wires. ive seen "aftermarket" electric speedo's from online bike warehouses, and even on JCWHITTNEY, but im not sure if those are compatable with the electronics of the bike. i dont want to cut, splice and tape wires together because eventually that leaves everything a mess. personally, id rather get a new one and simply plug it in and have it working right the first time around, or get one off a parts bike. i CAN find parts bikes on craigslist anywhere from 300 up to 500 bucks which all things considered, isnt too bad of a deal as long as it has everything i want still on it. let me ask you this......is it possable the speed sensor could have gone bad? and another problem that just started today, the turn signal cancelater isnt working right now either. if i put on the right signal, it flashes for about 10 seconds, then shuts off and i have to put it back on, and after i make my turn i have to use my thumb to shut it off. when i go to turn left, it wont shut off at all unless i shut it off with my thumb. are these problems all related or separate?

stuart, a.k.a. roadwanderer2.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Mon Sep 09, 2013 6:16 pm

There related.The cancler circuit gets pulses from the spedo circuit.
Yes the magic box could be bad.It really needs to be tested on the bike wih a volt meter first.
It's always the starting point.half way between the wheel and the display.
It's also a possibility there's a connection problem right at the instrument cluster.
I really need the voltages before I can direct you to the next step.
Just swapping parts is no guarantee .

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby roadwanderer2 » Mon Sep 09, 2013 6:37 pm

alright, i'll have the volts on it checked out tomorrow with a v/meter and i'll post the results from that, then we can take it from there. i dont know what time i'll post it, but it'll be sometime mid day here. i have a camera, but its not the best in the world, i'll try to take some pics of what the "magic box" looks like inside along with the magnet and what looks to be a mini processer. dont know how good they'll come out, but i'll try.

thanks virgilmoble.

stuart, a.k.a. roadwanderer2.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Tue Sep 10, 2013 6:59 am

IlL look at the wiring diagram this morning and post the color codes with the voltages.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Tue Sep 10, 2013 7:24 am

Here ya go....Just post if you have problems....
This is tested with the key ON....I think the steady volts are right at 5 Volts DC....The pulse should switch on and off as you turn the wheel....The color coded wires are shown...You can use any good ground for the meter.It doesn't have to be the wire...

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby roadwanderer2 » Tue Sep 10, 2013 11:43 am

thats a great diagram, gives me a better understanding of the color coded wires. let me print this out and take it out to the bike in the garage and check it.....i took it to the bike dealership this morning, and explained to the tec whats been going on with it, he said if the speed pulse generator is getting voltage, it might be in the guage cluster. i didnt get a chance to have him check it because he was very busy and couldnt fit me into his work day, so i brought the bike back home, and i'll see if i can find a analog volt meter. only ones around here are digital. an analog is "out of date" so im told. lol, figures. i might be able to borrow one from a friend, but i'll have to wait for him to get home from work. i used a "test" light on the wires with the key "on", on the speed generator half way up the fork just below the fairing, and only 1 wire is getting power, the other 2, nothing, no constant, no intermittent.

stuart, a.k.a. roadwanderer2.

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Re: Speedometer w/ digital readout...BROKEN NOT WORKING HELP

Postby virgilmobile » Tue Sep 10, 2013 12:22 pm

No test light please....they draw too much power for this delicate little circuit....
I would guess the internal part is capable of maybe 5 volts at 20 miliamp..0.020 amp on the output line..
Your test light wouldn't even light up on the pulsing output wire.

an analog is "out of date" so i'm told

Analog meters are common and cheap....Wal Mart has one in the Auto department for $10.
Harbor freight and radio shack have them too.Just don't buy the one in the electrical department.There geared more for house wiring voltages...The auto one measures down in the 2.5 DC volt range.
I find that a digital meter has it's application for accuracy but you just can't "see" small or rapid changes in signals with numbers jumping around...I like to see the needle wiggle...It's a cheap version of a oscilloscope.
I use the DVM for exact stable measurements,like battery volts,where a few tenths of a volt can be the difference between great and just OK.

he said if the speed pulse generator is getting voltage, it might be in the gauge cluster.


Yes it has to have voltage to the part AND have a pulsing signal going back to the cluster...The instrument cluster computer uses these pulses to determine the speed to display.No pulses,no speed displayed....easy stuff.

Keep us posted and don't forget the pictures...You could even post a video of your successful diagnostic skills...just link to the You Tube video.. :D




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