Would I be correct when I think that pin A on the ignition module (EST) provides the RPM signal to the ECM and pin E goes to the white tach signal wire under the dash?
I am trying to track down an issue where my tach no longer works. I checked my connection to the harness in the dash and it is good. I also tried a spare cluster and that tach does not work wither. This happened not long after I installed a new ignition module and I'm thinking that it is the culprit. I hooked up powerlogger and confirmed that the ECM is reading RPM.
I am trying to track down an issue where my tach no longer works. I checked my connection to the harness in the dash and it is good. I also tried a spare cluster and that tach does not work wither. This happened not long after I installed a new ignition module and I'm thinking that it is the culprit. I hooked up powerlogger and confirmed that the ECM is reading RPM.