Panel Instruments (924 & 944 Series): Speedometer

Locate connectors "A" and "B" behind dash gauges. Test for voltage supply and ground to speedometer head unit. Connect tester to connector "B", pin No. 13 (circuit No. 15) and connector "A", pin No. 9 (circuit No. 31). Battery voltage should be present when ignition switch is in "ON" position. To test transmitter input signal, see ELECTRONIC SPEEDOMETER SENDING UNIT  in this article.