I didn't wire it on the gauge cluster, but somewhat to an indicator mild bar like shown below (all over again briefly). I wired with the ignition to + of the light, then calculated 5.45V when grounded to chassis. The charging system doesnt seem to be wired for the ECU, https://4a-geengineforsale66546.is-blog.com/38954477/top-toyota-4age-secrets