I changed the gear set (3 gears - Z12, Z48/16 and Z48/12).
The gears work again. The Odometer moved when I manually turned the driving puls wheel (Z12).
I build everything back but when driving the car the odometer did not work.

I double checked that all the sockets on the back side were connected correctly.
Bust still the odometer does not move!

I remember that I had to bend back a small el. board that was in the way in order to remove the transparent plastic cover (holding the gear sets in place).

Can it be that I damaged the electronics?
And if yes.... how can I figure out where the problem is?

For instance: Is there a way to mimic the puls with a 12V power source ...
- finding the ground contact of the speedometer, put it on minus
- trying to find out which pin of the multi pin socket is the pulse input from the transmission.
- mimic the puls by short contacts with the input pin and watch the small gear moving with each puls

Does someone know which pin is the input from the transmission and what the el. signal character might be?

Thanks for any help, Martin

ps pictures show the odometer before gear repair.

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