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Home > Ordnance Documents and other related manuals > > Part C- Tracing Electrical Circuits
Relay Index.
Terminal Board Enclosure

Wiring Diagrams, M1A1 Tank
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
Hull/Turret Slip Ring Index.  The hull/turret slip ring index
identifies the electrical connections between the hull and the
turret found in the wiring diagram.
You find this index on
sheet 3 of the hull elementary wiring diagram.  It gives the
pin identification on connector J3, the function it controls,
the slip ring number, and the sheet number(s) where you find
the slip ring.
This completes part B.  This lesson continues with part C,
Tracing Electrical Circuits.
PART C - TRACING ELECTRICAL CIRCUITS
1.
Introduction.
This  part  of  the  lesson  uses  a  unit  level  functional  schematic
diagram and direct support/general support level wiring diagram to
trace electrical circuits.  Before proceeding any further, make sure
you review the electrical symbols given in appendix A, just as you
should prior to tracing any electrical circuits in your unit.  Do not
memorize the electrical symbols; you should always have the technical
manual on hand when tracing circuits.
2.
Unit Level Functional Schematic Diagram.
For this part of the lesson, you must use FO-6, Hull Electrical
System  -  Power  Distribution  and  Master  Power  Control  Circuit
Functional  Schematic  Diagram  (Unit  Level)(shown  in  appendix  A).
Begin tracing the system at the left side of the diagram by finding
the enclosure lines for the battery compartment.
You must remember
the diagrams show only the components that pertain to the circuit on
the  diagram.
In  many  cases,  the  electrical  assemblies  house
additional components used in other circuits.

Battery Box Enclosure.
Inside this enclosure you will find
the symbol for part of a bus strip, the battery connections
(2BT101  through  2BT106).
The  diagram  shows  how  you  must
connect the batteries:  in series-parallel.
In the enclosure lines for the battery box you also will find
two types of symbols for electrical connections.  Look at the
positive connections for 2BT101 through 2BT103; the lines go
to  a  clear  circle,  the  first  symbol  for  an  electrical
connection.
Follow  the  three  positive  lines  off  these
connections to where they join into one
11
OD1706






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