OM3006.3 04/98 Operation - Section 3 Instrument Panel and Indicators Page 3-35 Exiting The Diagnostics Mode 4. Pressing the Lamp Test switch to the bottom (‘‘ again will advance to the next fault code (if more than one code is present). Once all active fault codes have been displayed, the fault code display sequence will be repeated, starting from the first fault code. Starting the engine or turning the keyswitch to the OFF position will EXIT the diagnostics fault flash mode. If active fault codes have been determined as de- scribed previously, refer to the Cummins Engine Cen- try System ‘‘Troubleshooting and Repair Manual’’, Bulletin No. 3666070, or contact an Authorized Repair Location.