TM  10-3930-643-34 ELECTRICAL  SYSTEM  MAINTENANCE.  (cont) 5-2. Instrument Panel Wiring Harness. (Sheet 7 of 9) INSTALLATION  (cont) 39. Connect  lead  assemblies  (54  thru  51) to lead assemblies (50 thru 47). 40. Connect two lead assemblies (45, 44, 43 and 42) to connector (46). 41. Connect lead assemblies (40 and 39) to hourmeter (41). 42. Install  lamp  (37)  and  socket  (36)  in air pressure gage (38). 43. 44. 45. 46. Connect two lead assemblies (34) to oil pressure gage (35). Install lamp (33) and socket (32) in oil pressure gage (35). Connect wire assembly (30) and seven wire  assemblies  (29)  at  connectors  to start switch (31). Connect wire assemblies (27 and 26) at connectors to fan clutch relay (28). Go to sheet 8 5-23