[hotgolf]

Hi all, my first post to the board which from doing a search, may not get answered.

Anyway. I've replaced the gearbox speedo sensor on my '89 carrera.
I've got a good working speedo head but only works when I reach around 40mph.
I've metered the sensor on the box and it's not giving a reading until said speed, around 40mph.
At this speedo the needle rapidly rises and starts reading the correct speed.
Any ideas, or is the sensor playing up?
I've had the sensor back out and metered it while passnig a magnet over it and it seems to work fine. I'm well confused!

Thanks for looking.