Seeking basic wiring explanation of speedo connector block

[helloindustries]

Ahoy again, all.

Still on the trail of fitting a Koso DB01+ to my MD5.

Far as i can tell, all i need to know is which wire does what on the connector block on the back of the standard speedo/clocks so i can then route them into the appropriate connecting wire on the Koso module.

Had a bit of a google and a look through the manual, but found nothing i can see being useful.
Even just a list of which wire does what would be of use.

I'm just trying to avoid expensive labour charges at a garage for fitting when i could do most if not all of it myself with the right info.

Further: I'm thinking to keep things reversible (so i can take the speedo with me when i get a new bike), i'll knock together an adaptor for the existing connector and route the wiring to the Koso from there.

[schlumpf]

I've only got this:

L/Y: 12V for speed sensor
R/G: 12V permanent
W: speed signal
Br: 12V ignition switch
L: Illumination
B: Ground
Ch: Turn signal left
Sb: Neutral
Y: High beam
B/R: oil level
Y/B: rpm signal
Dg: Turn signal right
G/W: Water temp switch
G/R: Fuel warning
G: Fuel level

[helloindustries]

ONLY?! That's what i needed. That, my friend, is problem goddam solved!

[schlumpf]

Very well  .
Let's see your result when ready.

[helloindustries]

Just about to get the wiring illustrated, so once i've done that, at least, i'll post it up. It'll be a few weeks before i get the speedo. Seat needs some expensive work first.

[helloindustries]

OK, so based on previous posts, a look at the wiring, and referring to the manual for colour codes, this is what i currently have.

[helloindustries]

OK, after consulting the oracle guide, i've come this far.
It looks about right (the speedo is a separate cable provided)

[schlumpf]

One thing to add:
The "Water Temp Switch" controls the overtemperature warning light only. The fan itself has a separate switch, independant from the dash.

[Ruby Racing]

This helps me out too, so thanks Schlumpf.


I'm surprised nobody has mentioned the error code you may get by not using the OE speedo. I plan to get around this by running another white wire from the speedo pick up to the Igniter Box and the black/blue wire to the PickUp, so that the OE wiring set up is maintained. A couple of weeks away from doing that at the moment.


Good luck with yours.

[schlumpf]

I'm surprised nobody has mentioned the error code you may get by not using the OE speedo. I plan to get around this by running another white wire from the speedo pick up to the Igniter Box and the black/blue wire to the PickUp, so that the OE wiring set up is maintained. ..

I've not been aware of that error, I never swapped dashes, sorry.

Speedo sensors usually require an external pull-up resistor at their white line to generate any signal (for the experts: an open collector output). Usually those resistors are located inside the dash. If it's missing ...

I would stay with the original speedo sensor and add a 4700 resistor between white and L/Y (without proof that it works). Maybe add another 4700 between white and ground (B/L) to lower the amplitude to the original 5V (almost). That signal should suit the Koso and the ECU.

[Ruby Racing]

It's been said you get the error code of a faulty speedo drive by means of the rev counter needle jumping to 5,000rpm (I think it's 5,000rpm) and staying there. My theory is that previous folk who have installed aftermarket speedos have encountered this problem because they haven't maintained the connections I mentioned that run to the igniter box and the pick up coil. That's why I intend to try that to see if it prevents the rev counter warning.


Thanks for the extra info. I don't understand it, but when I come to wire my Koso up I'll run it by my tame Sparks!

[schlumpf]

Right. I also just checked the service manual. The speedo signal also goes into the ECU.
But I guess it's not a missing wire that's causing the error. Without a proper dash attached to the white wire there is no signal coming out of the speedo sensor. The speedo is only a kind of switch to ground. A switch without creating voltage. That's why I mentioned the pull-up resistor.

[helloindustries]

So far; This thread has been quite a learning experience for me. Very handy, too. It's appreciated.

I admit i'm having a little trouble distilling posts in to a list of things i'll need to do to when installing the Koso speedo.
Far as i can see, beyond the wiring diagram i've posted...

• I can reasonably ignore the over temp warning light.
  
• I may need to run a wire from the existing speedo to the Igniter box (whatever that is) and a black/blue wire (which i don't see anywhere) to the speedo to maintain a required circuit. But i may not need it at all.
  
• Something about a resistor of some type from existing speedo to Koso (so; Don't use the included magnetic sensor for the Koso?)
  
• Something to do with a pull-up resistor (whatever that is)
  

I don't mind admitting that i don't understand exactly what i need to do. This isn't my area of expertise. Graphic design is. I tinker at best, but i can manage the physical installation and such (clamp here, add connectors to wires there, install specific component between A and B etc...).
What i'd need before attempting this is very clear descriptions of what all these extra bits are. For example: What is a 4700 resistor?

[schlumpf]

The resistors are of value 4700 ohm each.
Hopefully the appended quick sketch clears it up a bit. It shows the relevant portion of the schematic. I have to admit that it's still an idea without any proof.
The behaviour of the missing dash is emulated by the resistors.
The ECU (or called igniter box) still gets the speedo signal as with the original dash. 

[helloindustries]

Thanks, schlumpf!

[Ruby Racing]

• I can reasonably ignore the over temp warning light.
  

If I worked things out correctly you will have the EOBD warning light spare, so you can use that for the over temp warning light.

[Hawko]

Hey Matey


Did you ever come right with your speedo wiring issues as Im also looking at the same problem?


thanks

[helloindustries]

Hey Matey


Did you ever come right with your speedo wiring issues as Im also looking at the same problem?


thanks

Sorry mate, never did go for the Koso. Don't even have the Fazer any more (VFR 800 for the last year and change).

[justanothernoob]

I'm going to be wiring up a Koso DB-03 hopefully in the next couple of weeks so will post up anything I work out.

Just gotta get the 'busa front end fitted first

[Hawko]

[quote author=Hawko link=topic=14399.msg239744#msg239744 date=1471625531]
Hey Matey


Did you ever come right with your speedo wiring issues as Im also looking at the same problem?


thanks

Sorry mate, never did go for the Koso. Don't even have the Fazer any more (VFR 800 for the last year and change).
[/quote]


Ok many thanks for replying