Club 80-90 Forums

I bit golfy I know.

I've got a VDO speed sensor (Hall sensor) from a golf GTi with MFA comuter (goes in the back of the speedo). Not sure how to wire it as it has 3 terminals. Anyone got a wiring diagram for a Golf mk1/2 that shows the dash with MFA?

I have a Bentley covering the Golf and Jetta. The Speed sender has three connections, switched 12V (term 15) /black, ground/brown, and output, which is wired straight to the MFA chip on 'current track 2' which I assume means pin two.

Cheers Andy, so it doesn't need a specal stabalised voltage, just normal batt levels. Any idea which terminal are which? No markings as its ment to go onto PCB. I've herd voltage across the outer pair and signal is middle seems likely, would polarity be important? Don't want to break it!

Assuming this is all within the dash pod PCB, is there an output terminal on the pod multiplug for the signal to go to other divices, if so is it just a streight wire from the sensor or does the signal get modified through something?

I want to wire the speed sensor into a cruse control and a radio. Cars with cruse control (or speed sensative volume on later Passats) have a different sender type to cars with MFA (finding a T3 style (also used on golf 1/2/early passat) cruse control speed pickup I don't think I'll manage, and of course they are obsolete, but MFA senders are more abundent), and aparently the signals are slightly different (one AC, other digital), but theres no mention of what happens on cars with both options - must use the MFA signal asuming the output isn't modified in the MFA dash as there is only one type of cruse controler so hopefully works with all signals. My radio surports speed sensative volume as well and that doesn't claim to be fussy in the instructions - if theres a pin out on the dash I bet it'll cope with it.