TM    5-5420-226-20-1 Symptom-8 DETAILED TROUBLESHOOTING PROCEDURE .T VEHICLE OPERATION -  POWERPLANT, STARTING (Continued) ) m Check   high  voltage   ignition   lead  for  short  to  ground. First Technician (Powerphmt) l   Connect   engine   electrical    harness   connector to  manifold heater ignition unit at   cold    manifold heater. l   Disconnect high voltage ignition lead    from manifold heater ignition unit    at   cold    manifold heater (keep this lead). l   Disconnect high voltage ignition lead    from manifold heater    ignition unit   and   spark    plug   at  manifold heater    on opposite side   of   engine and    connect it   to   ignition unit and    spark plug    of   cold manifold heater. Second Technician (Operator’s Station) l   Set   MASTER BATTERY switch ON. l   Press   STARTER and preheat switches at   the    same time, hold on   for   approximately 10  seconds, then release. First Technician (Powerplant) l   Check   if  heat    can    be   felt   from   manifold heater. ) Did  manifoid   heater   get  hot? I r HIGH IGNITION VOLTAGE UNIT LEAD (RIGHT SIDE    OF   ENGINE SHOWN) l   Replace   manifoid   heater Replace   high  voitage   ignition ignition   unit  (page   7-289). iead  (page   7-289). l   instaii  high  voitage   ignition iead  to  manifoid   heater without   a  iead. TA1069O9 4-220