Who is our in house wiring guru?

[lord flashheart]

Had a couple questions about getting the speedo to work on a automatic to manual conversion. Ive been screwing around with this for a little while.
Ok question numbro uno.
This is signal FROM the cluster TO the ECU, and not the other way around correct? Notice the connector is A10 at the cluster.



Ok now look at this diagram





A10 has (what im assuming is) a pull up resistor. When i look at this diagram i see that the speedo has:
key-on power (c11)
Ground (b1)
Vehicle speed sensor (2,3)
With all those connected the tach should work right? The speedo wouldnt need a ECU signal and a VSS signal would it?
I know im getting power and ground because the tach works and they run on the same circuit.
The trouble shooting section says

no vehicle speed code:
Does speedometer work?
Yes: check wiring between cluster and ECM
No: check vehicle speed sensor number 2
So this tells me 1 thing: that the ecu doesnt drive the speedo right?

Sooooo Why the F doesnt the speedo work? What could i possibly be missing? A broken speedometer maybe?? Bad vss? i triple checked my wiring. So its solid.
Any thoughts?

[meepers]

Which speed sensor are you using? Should be a 2 wire. Signal goes from vs direct to speedo. Speedo then outputs modified signal to the ecu and cruise/auto trans. If your speedo doesn't work it can only be:

Bad/incorrect vss
Wiring
Speedo broken

If you have a scanner plug it in and see if it reads speed.


Did you use your old auto vss and lengthen the wires? That's what I did. I put in a WRX trans and couldn't use the 3 wire vss

[lord flashheart]

Thats exactly what i thought! Im not completely nuts! I just needed someone to tell me im not retarded.
I cant use a scanner because standalone.
Yea i got the correct sensors. And i actually got a spool of wire and wired it up to illiminate the possibility of a bad connection.

Thanks bro!

[Alphius]

Signal goes from VSS to cluster to ECU as meepers said. It should work with what you have wired up. You can set a multimeter on A/C voltage and test the VSS input and output from the cluster as you drive to see if the voltage increases when you drive. If so, your VSS is probably working properly and the speedo is likely to be dead.

[lord flashheart]

Well i nabbed a new VSS. So i will probably slap that in. But i will also probably grab a new cluster cuz my tach and fuel gauge are a little fucked up. So i kinda have suspisions that the speedo is fubar'd

[lord flashheart]

WOW! The new site doesnt block F-bombs?! This is great! Now i really love the new site!

[meepers]

Thats exactly what i thought! Im not completely nuts! I just needed someone to tell me im not retarded.
I cant use a scanner because standalone.
Yea i got the correct sensors. And i actually got a spool of wire and wired it up to illiminate the possibility of a bad connection.

Thanks bro!

thats awesome