STILL HAVING PROBLEM DIDGY DASH

[PROF]

Thanks to all how helped last time have now got it working but
it is now at 5 mph it is saying i am doing around 40+mph and it work's in reverse.
Can any one help with this one please
Do the dash and the gear box sender have to match? i.e from the same car. email me richard@greensp226.fsnet.co.uk
Thanks
Richard

[Riggy]

yes the dash and sender have to match

well there are 3 groups with different codes
AK,AF, and i cant remember the other

[Aragorn]

thats the only differences - the AA coded senders = the AH ones iirc

[Riggy]

thats the other

cheers kev