Focus Fanatics Forum banner

ST170 VSS sensor / wiring (Standard Zetec with 6spd Getrag Transmission)

9.9K views 18 replies 6 participants last post by  Leyland  
#1 ·
Hi,

I hope this is posted in the correct section, but since it's Technical for Focus' I assume it is.

I'm fitting a Zetec with svt gearbox (the 6speed) into my mk1 Fiesta (1981)
It's all fitted, no big problems there.

But now i need to run a speedo. The gearbox uses a VSS.
Does anyone know how these are wired in? I only have the sensor, if I want the plug + wires, Ford told me to buy an entire wiringloom of an ST170...

So I'm looking for information, to wire up the sensor correctly.
I assume it's got 12v positive, ground and signal. but to which pin...

Any help appreciated.

With best regards,

Martein
The Netherlands
 
#6 ·
The OSS is a hall effect sensor similar to the crank sensor on the engine. You would need the proper computer to use this signal. The signal rate is 89 holes per revolution. There is a ground, 12V, and signal wire.
 
#15 ·
Ok, thanks a lot.
Today I had to pull the engine and gearbox out, because I had a leaky waterpump (gasket between the engine and pumphousing)

With a bit of luck I might be able to start her up for the first time this weekend.

Here's a slim spec list on the engine/gearbox combo:

2.0 L Zetec (Series 3)
6 speed gearbox, Quaife diff, Clutchmasters flywheel/clutch package (spec3)
custom driveshafts
custom stainless exhaust
45mm jenvey throttlebodies
stand alone management (weber aplha)

At the moment it uses std camshafts, but will upgrade these soon too.

Thanks a bunch, Martein
 
#19 ·
Hey Guys,

i know this Thread is very old. But i have the same Problem like Martein, just a little different.

I have put a 2.0 Zetec Silvertop incl. the 6-Speed Getrag into my 90s Fiesta.
Which pins should I use from the VSS sensor, I know now.

But with how much voltage operates the Hall sensor?

I don´t think its 12Volts. I guess rather with 5 volts. But im not sure.
Does anyone know it exactly? I do not want to damage the sensor, due to high voltage!

Sorry for my bad English and many thanks for your answers in advance :D

Daniel (from Germany)

Edit:

If anyone is interested in my conversion, here is a link:

http://www.ford-forum.de/showthread.php/81928-Motortuning?p=1154993#post1154993