Anyone got a wiring diagram for MO559 (speedo drive)

[450Nick]

I am re-doing my dash wiring loom at the moment and accidentally threw out the connector I'm sourcing a new connector but does anyone have a wiring diagram for it??

Thanks!

[450Nick]

No one...?

[blitzracing]

Depends what you mean really- there are two grey (I think anyway) wires that come from the transducer at the back- these then feed into the speedo calibration box on the way to the back of the speedo. The calibration box has these two greys, a 12 volts and ground, plus an output to the ECU. If you remove the lid of the unit, you can easily identify the 12 volt and ground connections either as black and red or the markings on the PCB. I dont recollect the other wire colours, but if you are still stuck I have a unit I can open up if needs be.

[450Nick]

Thanks Mark! Here's what I have - I'm guessing then that the red and black are + and Earth, yellow is speedo and ECU out, and White is signal in..?

Edited by 450Nick on Thursday 2nd June 15:19

[blitzracing]

The LM2917N chip is the input side from the diff sensor, so you just want to check the yellow wire goes to that if you look at the PCB track. The white will come from the other chip if Im correct, and this feeds the ECU speed signal only. The speedo box does not affect the speedo connection at all, is it piggy backs on the diff sensor signal on its way to the speedo, so it should still work even without the speedo calibration unit being connected.

[450Nick]

Ah well the yellow pin is soldered to the one next to it, so I guess then that the input and speedo out are those two, which would make the white the ECU output?

[blitzracing]

That would tally.

[450Nick]

Nice.