Quote Originally Posted by bluscreen View Post
I'm thinking my Actron meter may be dead. I'm troubleshooting an open loop issue and when I try the above test (car off, RPM relay wires jumpered) I hear the FV buzzing, but connecting the meter to an engine ground (or any ground) and onto the bottom-right diagnostic pin (or disconnecting that and using the orange wire directly) yields no output when the meter is set for Dwell. When set for RPM it shows 2-ish on the bottom 8-cyl scale, and when setting to volts it shows 5-ish. In fact, with the car running (and warmed up but still clearly in an open loop) the dwell setting still shows nothing. When running the RPM setting I think moves the needle over to a steady 10 if I recall correctly. Any wisdom for this? Is a new meter in my future?

(Brand new Bosch O2 sensor and confirmed continuity for it to the lambda ECU and also that it is grounding)
The orange wire is the FV signal through a 1 kohm resistor. Try your meter on the three pin bulkhead connector red/ brown wire but my bet is your meter is NG.