Specifications

36
Testing Procedures
D.C. Charging Adaptor
Rectifier Bridge Check With Ohmmeter for D.C.
Adaptor
Continuity should exist during one of the two following
tests. No continuity should exist while performing
the opposite test.
If continuity exists during both tests, or if no continuity
exists during both tests, the D.C. adaptor is defective.
TEST NO. 1 - Connect negative probe of meter to
red output lead. Connect positive probe of meter to
both A.C. terminals and black output lead (diag. 66).
2000 R.P.M. - 8.0 Volts A.C.
3000 R.P.M. - 10.5 Volts A.C.
3600 R.P.M. - 12.0 Volts A.C.
CAUTION: When testing Alternator/Charging System:
DO NOT disconnect positive lead(s) from the battery while the engine is running. With the engine
stopped, disconnect lead(s), then perform test and stop engine before re-connecting. Connecting
or disconnecting while the engine is running will send a voltage surge through the regulator, causing
damage.
TEST NO. 2 - Connect positive probe of meter to red output lead. Connect negative probe of meter to both
A.C. terminals and black output lead.
Connect negative probe of meter to black output lead. Connect positive probe of meter to both A.C.
terminals and red output lead.
If the D.C. adaptor is not defective and a known good battery fails to hold a charge, then perform an A.C.
output voltage test.
NOTE: PRIOR TO AUGUST 1992, THE BLACK WIRE WAS BROWN.
CHECKING THE SYSTEM: To check the system, disconnect the D.C. adaptor from the add-on alternator.
Connect a No. 4414, 18 watt bulb in line with each terminal in the alternator. Start engine and test circuit
using an A.C. voltmeter as shown.
With the engine running, minimum A.C. voltage values across the bulb should be:
2000 R.P.M. - 8.0 Volts A.C.
3000 R.P.M. - 10.5 Volts A.C.
3600 R.P.M. - 12.0 Volts A.C.
If the minimum values are noted, alternator is okay. If the minimum values are not noted, the alternator or
A.C. connector is defective.
66
Red
Black
A.C. TERMINALS
Red
Black
#4414
BULB