Section 4. Electrical Control Panels - Tecumseh HH100 Handbook

SECTION 4. ELECTRICAL CONTROL PANELS

AMMETER
HEAVY DUTY
PUSH BUTTON
STARTER SWITCH
ELECTRICAL CONTROL PANEL SERVICE PART
NO. 730155. The test procedures explained below
will deal only with the control panel.
Before attempting to locate an apparent defect in
the control panel switches or ammeter, insure all
connections between control panel, starter and battery
are secure and free from corrosion and wire or insulation
breaks. Battery should be fully charged or be at a
minimum of 75% charge. Engine ignition spark should
be checked for an intense spark.
Remove side plates from control panel. Remove engine
alternator connector plug from panel connector. Use
a volt-ohm-millimeter or battery powered test light
for the following tests. CAUTION - Remove (+) lead
from battery before attempting any of the following
tests.
GREEN
ON-OFF
SWITCH
GREEN
BATTERY POWERED
CONTINUITY TESTER
REMOVE POSITIVE (+)
LEAD WIRE FROM BATTERY
ON-OFF SWITCH IGNITION GROUND CIRCUIT.
Remove both the green wires from switch terminals.
Attach test leads of tester (Battery type test light or
ohmmeter) to switch terminals. Move toggle switch
to the "ON" position. No continuity (light should not
light) should exist. Leave test leads attached to switch
and move switch to "OFF" position. Continuity should
exist (light should light). If switch fails to either test,
switch must be replaced.
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IGNITION CUT-OFF
TOGGLE SWITCH
on
off
BROWN
ON-OFF
SWITCH
BATTERY
POWERED
CONTINUITY
TESTER
REMOVE POSITIVE (+)
LEAD WIRE FROM BATTERY
ON-OFF SWITCH - DC RELAY CIRCUIT. Remove
both brown wires from switch terminal. Attach test
leads to switch terminal. Place switch to the "ON"
position. Continuity (test light should light) should
exist. Leave test leads attached and move switch
to the "OFF" position. Continuity should not exist
(test light should not light). If switch fails either of
these tests, switch must be replaced.
BROWN
BATTERY POWERED
CONTINUITY TESTER
STARTER SWITCH. Remove wires from starter switch.
Place test leads on to switch terminals. No continuity
should exist (Test light should not light). Leave test
leads attached depress starter button. Continuity
should exist (Test light should light). If starter switch
fails either of these tests, replace switch.
AMMETER. CAUTION The ammeter will not show
a charge if the battery is at full charge. The rate of
charge will depend on the amount of charge in the
battery. The lower the charge in the battery, the higher
the reading on the ammeter. If ammeter does not
show a charge or discharge, start and stop engine
(use electric starter) several times to lower charge
of the battery. Observe ammeter and if there is no
deflection, proceed with the following test.
BROWN
REMOVE STARTER
MOTOR WIRE
STARTER SWITCH
REMOVE POSITIVE (B+)
WIRE FROM BATTERY