TOHATSU 40 Service Manual page 206

Test 2a - Stop Circuit Main Key Switch Test
This test is used to determine whether the main key switch and
connecting wiring are functioning normally.
Make sure all electrical terminals are connected
during this test except those that are noted in the
test procedure.
Check for continuity between chassis ground and
the ground connection for the magneto plate, CD
Unit, and ignition coils before conducting the
following procedure.
All continuity tests must be conducted with negative
lead from battery disconnected or you may damage
the meter.
1. Remove negative lead from battery.
2. Disconnect main key switch terminals (1), (2), (3) and (4).
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3. Set analog multimeter to check continuity. Connect one
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meter lead to terminal (1) and the other to terminal (3).
4. Turn main key switch (7) to OFF position, meter must
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show continuity. If not, replace main key switch.
5. Turn main key switch to ON position, meter must not show
continuity. If it does, replace it.
3-/ 4-Cylinder
NOTE
ELECTRICAL SYSTEM
T1475
7-27