lusting over something...
Join Date: Nov 2007
Rep Power: 1
Today I dove even further into the problem. I removed the gauges completely, separated the housing and removed the PCB. Upon inspection, there was no damage to caps or any burn marks. In case there was some invisible dirt, I used an aerosol electronics cleaner and brush over every circuit, cap, and resistor. Once everything dried, I plugged it all back in and still the same problem.
The dials sweep, everything else works perfectly, but the tach isn't registering any change to RPM. Interestingly, when the gauge is unplugged and you manually move the needle, it drops to zero slowly. When doing the same thing to the needle when the bike is running, it snaps back to zero instantly.
Can anyone with more electronics experience help out here?