Testing Regulator-Rectifier 10 Amp System; Testing Regulator-Rectifier 16 Amp System - Briggs & Stratton 405777 Series Manual

Test Regulator-Rectifier
NOTE: 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 DC Shunt, Tool #19468, to
avoid blowing fuse in meter. See special instructions for
installation procedure on 16 amp system.
NOTE: Regulator-rectifier will not function unless it is
grounded to engine. Make sure the regulator-rectifier is
securely mounted to engine.
When testing regulator-rectifier for amperage output, a 12
volt battery with a minimum charge of 5 volts is required.
There will be no charging output if battery voltage is below
5 volts.
NOTE: Connect test leads before starting engine. Be sure
connections are secure. If a test lead vibrates loose while
engine is running, the regulator-rectifier may be damaged.

Testing Regulator-Rectifier 10 Amp System

Connect stator wire harness to regulator-rectifier.
1. Insert RED test lead into 10 A receptacle in meter.
2. Insert BLACK test lead into
3. Rotate selector to
4. Attach RED test lead clip to red DC output terminal on
regulator-rectifier, Fig. 22.
RED DC OUTPUT
CONNECTOR
RED TEST
LEAD
Fig. 22 − Testing Regulator-Rectifier
5. Attach BLACK test lead clip to positive (+) battery termi-
nal.
6. With the engine running at 3600 RPM. The output
should be:
* 3 − 10 Amps − 10 Amp System
*Depending upon battery voltage. For example, if the
battery voltage was below 11 volts, the output reading
would be 10 amps. If battery voltage is at its maximum, the
amperage will be less.
7. If no or low output is found, be sure that regulator-rectifi-
er is grounded properly and all connections are clean
and secure. If there is still no or low output, replace the
regulator-rectifier.
Testing Regulator-Rectifier − 16 Amp System
To avoid blowing fuse in meter when testing DC output of 16
amp system the DC Shunt, Tool #19468 is required.
receptacle in meter.
(DC amp) position.
TSM
BLACK TEST LEAD
TO POSITIVE
BATTERY TERMINAL
The DC Shunt must be installed on the negative (-)
terminal of the battery, Fig. 23. All connections must be
clean and tight for correct amperage readings.
Connect stator wire harness to regulator-rectifier.
1. Install shunt on negative battery terminal.
2. Insert RED test lead into
insert into RED terminal on shunt, Fig. 23.
3. Insert BLACK test lead into
and insert into BLACK terminal on shunt.
4. Rotate selector to
BLACK TEST
BLACK
LEAD
TERMINAL
DC SHUNT #19359
Fig. 23 − Testing Regulator-Rectifier 16 Amp
System With DC Shunt
5. With the engine running at 3600 RPM, the output
should be:
* 3 − 16 Amps − 16 Amp System
* Depending upon battery voltage. For example, if the
battery voltage was below 11 volts, the output reading
would be 16 amps. If battery voltage is at its maximum, the
amperage will be less.
6. If no or low output is found, be sure that regulator-rectifi-
er is grounded properly and all connections are clean
and secure. If there is still no or low output, replace the
regulator-rectifier.
receptacle in meter and
receptacle in meter
position.
RED TEST
LEAD
RED TERMINAL
11