41
18 Watt A.C. Lighting Alternator
CHECKING THE SYSTEM:
To check the system,
disconnect the plug from the rest of the lighting
system. Connect a wire lead from the single pin
connector coming out of the engine to one terminal
of a No. 4414, 18 watt bulb. Connect another wire
lead to the other terminal of the bulb and run to a
good ground on the engine. Start the engine and test
the circuit using the A.C. voltmeter as shown (diag.
8).
With the engine running, minimum A.C. voltage across
the bulb should be:
2000 R.P.M. - 6.0 Volts A.C.
3000 R.P.M. - 8.5 Volts A.C.
3600 R.P.M. - 10.0 Volts A.C.
If minimum values are noted, the alternator is okay. If
less than the minimum values, the alternator is
defective. See Chapter 9 for "Disassembly
Procedure".
3 AMP
Before making any exterior tests, check for inoperative
switch, shorted wires and burned out headlight and/
or stop tail light. To check out the alternator, check
the A.C. lead to ground at each yellow wire (diag. 9).
With engine running, minimum values should read:
2500 R.P.M. - 8.0 Volts A.C.
3000 R.P.M. - 9.5 Volts A.C.
3300 R.P.M. - 10.5 Volts A.C.
3600 R.P.M. - 11.5 Volts A.C.
It the above minimum readings are noted, the
alternator is okay. Check for defective lights, wiring
or switches, if less than the above readings, the
alternator is defective. See Chapter 9 for
"Disassembly Procedure".
NOTE:
ON OLDER POINT IGNITION SYSTEMS,
THE A.C. OUTPUT LEADS ARE BLACK AND RED.
2.5 Amp D.C., 35 Watt Lighting
To check this system follow the meter hook ups at the
right, checking the D.C. neg and D.C. positive first. If
output is below standard listed pull back protective
coating in front of the diode and check A.C. output. If
A.C. is good check each diode it services as requested
see parts list.
D.C. valve (+) or (-) check A.C. outputs both sides.
R.P.M. D.C. Volts
R.P.M. Volts A.C.
2500 - 8.0 Volts D.C.
2500 - 18 Volts A.C.
3000- 9.5 Volts D.C.
3000 - 22 Volts A.C.
3300- 10.5 Volts D.C.
3600 - 26 Volts A.C.
3600- 11.5 Volts D.C.
NOTE:
These minimum numbers should be obtained
by your meter and will often be higher.
YELLOW
#4414 BULB
ENGINE
8
10
9
D.C.
TWO DIODES
RED
D.C. NEGATIVE
OUTPUT LEAD
(BROWN D.C.)
D.C. POSITIVE
OUTPUT LEAD
(RED D.C.)
A.C.
D.C.
YELLOW
YELLOW
A.C.
YELLOW
GREEN
IGNITION
STOP
