Test Equipment; Digital Multimeter And Dc Shunt - Briggs & Stratton Twin Cylinder L-Head Repair Manual

The following list is provided to aid you in diagnosing problems with alternator systems.
COMPLAINT
"Battery not charging"
"Battery in state of overcharge"
"Headlamps not working"
"Electric clutch not working"
(Tri-Circuit Alternator)

TEST EQUIPMENT

The following equipment is recommended to test and
repair alternators.

Digital Multimeter And DC Shunt

The Digital Multimeter is available from your Briggs &
Stratton source of supply. Order as Tool #19357 or
#19390. The meter may be used to read volts, ohms or
amperes, and test diodes, when leads are inserted in
the appropriate receptacle, Fig. 11.
The Digital Multimeter will withstand DC input of 10 –
20 Amps for up to 30 seconds. When checking DC
output on 16 Amp regulated system, use the DC shunt,
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TROUBLESHOOTING
• Engine RPM too low.
• Defective battery.
• Loose or corroded battery ground leads.
• Loose or corroded battery charge leads.
• Open, shorted or grounded wires between output connector and battery.
• Defective diode (open or shorted).
• Defective or improperly grounded regulator-rectifier.
• Diode installed incorrectly (reversed).
• Damaged battery (shorted battery cells).
• Excessive current draw from accessories.
• Low magnetic flux or damaged alternator magnets.
• Severe battery vibration (missing or broken tie down straps).
• Battery rate of charge not matched to alternator output.
• Damaged battery (shorted battery cells).
• Defective regulator.
• One OHM resistor shorted or grounded (Tri-Circuit system only).
• Inline fuse "blown" (if equipped).
• Defective headlamps.
• Loose or corroded wires.
• Open, shorted or grounded wires between output connector and head-
lamps.
• Light switch defective.
• Defective diode Tri-Circuit system
(open or shorted – white output lead side).
• Low magnetic flux or damaged alternator magnets.
• Inline fuse "blown" (if equipped).
• Loose or corroded wires.
• Open, shorted or grounded wires between output connector and
electric clutch.
• Defective diode (open or shorted – red output lead side).
NOTE: Battery will also not charge.
• Defective electric clutch switch.
• Open, shorted or grounded clutch circuit.
• Low magnetic flux or damaged alternator magnets.
Tool #19359, to avoid blowing fuse in meter, Fig. 12.
POSSIBLE CAUSES
NOTE: The Digital Multimeter is equipped with
two fuses to prevent damage to the meter
in the event that the input limits are
exceeded. If the meter displays a reading
of 0.00 when testing DC output (
check fuses in meter. Refer to FLUKE 23
Operators Manual for procedure for check-
ing fuses. Replacement fuse is available
from your Briggs & Stratton source of
supply. Order Part No. 19449.
),
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