2
4
ENGINE WIRING HARNESS
The engine wiring harness consists of a ground wire with a
diode for each armature and a separate wire for the
carburetor solenoid, Fig. 9. The engine wiring harness is
connected to the wiring harness provided by the equipment
manufacturer. A raised rib on the polarized connector
indicates the ground side.
See engine wiring harness diagram, page 5.
Fig. 9 − Engine Wiring Harness
SOLENOID
CONNECTOR
TO ARMATURES
POLARIZED
CONNECTOR
GROUND
EYELET
DIODES
Testing Ground Wires
The Digital Multimeter, Tool #19464 is recommended to
test the ground wires, Fig. 10. The digital multimeter is
available from your Briggs & Stratton source of supply.
The following test will be made with the meter in the
(Diode Test) position.
Fig. 10 − Digital Multimeter − Tool #19357 or #19390
In the Diode Test position, the meter will display the forward
voltage drop across the diode(s). If the voltage drop is less
than 0.7 volts, the meter will “Beep” once as well as display
the voltage drop. A continuous tone indicates continuity
(shorted diode) An incomplete circuit (open diode) will be
displayed as “OL.”
1. Insert RED test lead into
receptacle in meter.
2. Insert BLACK test lead into
receptacle in meter.
3. Rotate selector to
(Diode Test) position.
4. Insert RED test lead clip into connector “A” (black wire),
Fig. 11. Leave attached for remainder of test.
5. Touch BLACK test lead probe to terminal “B.”
a. If meter “Beeps” once, diode is OK.
b. If meter makes a continuous tone, diode is defec-
tive (shorted). Replace ground harness.
c. If meter displays “OL,” diode is defective (open).
Replace ground harness.
6. Now repeat test for terminal ‘‘C.” Results must
be the
same.
See Diode Failure Diagnosis on page 5.
Fig. 11 − Testing Ground Wire
“A”
“B”
“C”
POLARIZED
CONNECTOR
ARMATURE
TERMINALS
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