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K100-forum.com » Technical, repair and troubleshooting » Electrical » how to test speedo sensor

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1Back to top Go down   how to test speedo sensor Empty how to test speedo sensor Wed Aug 10, 2016 7:18 am

Ian Drinky

Ian Drinky
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active member

  • My speedo has stopped working after removing the rear drive and changing the oil, how do you test the sensor on my 1983 k 100

    

2Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Wed Aug 10, 2016 7:52 am

92KK 84WW Olaf

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Any chance it got pulled a little and got pulled out of the connector into the loom that's rear of the air box? Just follow the wire up....

Happened mine.....


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

3Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Wed Aug 10, 2016 7:59 am

GTJos

GTJos
Silver member
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Very Happy Hi Ian !
There are several topics on this forum about the issue; just make a search for 'speedo sensor'.
Often it is a loose (or corroded) connector.
Good luck..


__________________________________________________
how to test speedo sensor Deutch10Ich bin enge Kirchröatsjer jong; adieë wa ?! how to test speedo sensor Deutch10
                                1992  K1100LT 6458188
                                1987 K100LT (RS-fairing) 0170844 + sidecar EML GT2001
                                1986 K100RS 0085647 + sidecar Velorex 562
                                1985  K100RT  0027026
    

4Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Wed Aug 10, 2016 8:25 am

Rick G

Rick G
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You can use an electric soldering iron the 50hz gives a signal of 100 pulses per secons which is 61KPH.
Hold the iron element area not the tip very close to the bottom of the sensor when it is out of the rear drive


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

5Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Wed Aug 10, 2016 10:43 am

duck

duck
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RicK G wrote:You can use an electric soldering iron the 50hz gives a signal of 100 pulses per secons which is 61KPH.
Hold the iron element area not the tip very close to the bottom of the sensor when it is out of the rear drive

This varies by soldering iron. Before I started using Karumba I found that some soldering irons put out a sufficient magnetic field while some do not.


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6Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Thu Aug 11, 2016 7:21 am

Dai

Dai
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If you have a good multimeter, switch it to the 'less than one volt AC' setting. Unplug the speedo sensor under the relay box (may be easy to get at under the righthand sidepanel - it's a two-pin connector with a brown and yellow wire) and put the multimeter probes in the socket. Start the bike up and pull it through the gears by hand - if the pickup is behaving itself you'll see the voltage climb from zero to about 0.245 volts AC in top gear at about 3000rpm. Just make sure the rear tyre isn't in contact with the ground! Very Happy


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

7Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Thu Aug 11, 2016 7:35 am

92KK 84WW Olaf

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Life time member
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As Dai says...but the rear brake switch connector is similar and nearby so trace the wire all the way up to the connector.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

8Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Thu Aug 11, 2016 11:05 am

Inge K.

Inge K.
VIP
VIP
The rear brake switch connector have round pins.
The speedo sensor connector have flat pins arranged as a T.


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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

9Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Thu Aug 11, 2016 11:51 am

92KK 84WW Olaf

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Life time member
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Inge K. wrote:The rear brake switch connector have round pins.
The speedo sensor connector have flat pins arranged as a T.

Thanks Inge. Owe you a lot of beers so you need to start planning a trip over here some time.! They didn't call me Olaf for nothing.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

10Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Thu Aug 11, 2016 12:19 pm

Ringfad

Ringfad
Life time member
Life time member
92KK 84WW Olaf wrote:
Inge K. wrote:The rear brake switch connector have round pins.
The speedo sensor connector have flat pins arranged as a T.

Thanks Inge. Owe you a lot of beers so you need to start planning a trip over here some time.! They didn't call me Olaf for nothing.


Just checked Flights from Rygge to Dublin (return) -  €34 in September.

I will probably spend more on fuel during the weekend run.

There is always a bed for Inge in Dublin (and maybe a few how to test speedo sensor 905546712 )


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how to test speedo sensor Ir-log10

 ;BMW; K1 Black 1993 60K Km     ;BMW;  K1100RS Black 1996       ;BMW; K1 Blue 1990 25K Miles

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11Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Thu Aug 11, 2016 4:21 pm

92KK 84WW Olaf

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Life time member
Life time member
Inge what are you waiting for now?

We know beer is much cheaper here so I guess at 8 pints you will be at break even.!!!


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

12Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Fri Aug 12, 2016 1:15 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
One alternate method is to place a 9V battery between thumb (+) and forefinger (-) of your left hand whilst sticking your tongue into the connector of the speedo sensor. If it does nothing for you it's not your fault.  Wink


__________________________________________________
"How many cars did we pass today?" "ALL of them."
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT
    

13Back to top Go down   how to test speedo sensor Empty Re: how to test speedo sensor Fri Aug 12, 2016 6:53 pm

Dai

Dai
Life time member
Life time member
He's on the forkxxxx already... Twisted Evil


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

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