620 Rev Counter Pulse signal. What wire??

[dlloyduk]

Can anyone tell me which wire I can tap into to get a Rev pulse on a 620?
I,ve got a gear indicator to fit but not sure the where I can tap into.
Save me a few hours Please?:dizzy:

[nino cataldo]

hi, on my 2001 s4 it was the green wire on left side plug on ecu.
hope this is helpfull ,because I Know how frustrating it is.
rgds Nino.