where does the signal wire go o a 5000 turbo? the stock tach does not always work. and if you know do you have a pic of it?

<ul><li><a href="http://www.sjmautotechnik.com/trouble_shooting/ecupinpc.html">http://www.sjmautotechnik.com/trouble_shooting/ecupinpc.html</a</li></ul>

forget the pinout exactly.

its a 15v pk-pk or so sine wave, 135 cycles per revolution.

then the ECU has a line out to the tach. I dont know what sort of signal it sends it though. perhaps just TTL buffered version of the original. maybe something else... frequency dependent voltage perhaps.

i an kinda a tard when it comes to a wiring diagram. can you tell me what color the wire is.

thanx
jason
87 audi 5000 turbo