Identify Hall Effect Speedo (3-wire) Wires

[andrewzuku]

I need help identifying the wires coming from the 3 wire hall effect sensor on a 1991 Soarer V8 (UZZ31) transmission (A341E).

Here's the the wires I have, and what I think they're for...

Rear of car, Yellow: Supply 12V to this wire?
Middle, Pink: Ground?
Front of car, Blue: Signal that goes to the speedo?

Does anyone know what they are for sure?

I know this question has been asked before, but as far as I can tell, it's never been answered.

 

[andrewzuku]

I'm confident that I got the above right. I used the following procedure to test the sensor...

12V power to 12V pin (yellow)
batt negative to GND pin (pink)
Multimeter lead - on GND pin (pink)
Multimeter lead + on Signal pin (blue)

When I turn the cog I see the voltage change from 0v to 13v

 

[devojet]

Sounds like you got it figured out. I used a simular technique to work out my Crown sensors.