Lost Rpm Signal - R33 Gtst

[Tony Olsson]

Evening all, over the last few days I have been installing some electronic bits and pieces into my r33 and have come to a brick wall, I have lost my RPM signal! Everything else is working fine and without trouble but somewhere along the line RPM has gone walkabout. I have tried everything I know and have de-re-soldered every wire and before a start pulling the dash apart to look for dry solders behind the rev meter I thought I might ask here. So taking everything I have put into the car out of the equation (can deal with them later) what may be some reasons my rev meter gauge in the dash might stop working. I have 14v coming from the rev signal wire at the ecu when the car is on. The rest of the dash (gauges, lights) works fine. Any ideas, please?