TM 9-2350-368-25
NOTE
All checks should be made with suitable multimeter and
powerplant test stand master switch in the on position.
Battery voltage can range from 22 to 26 volts without the engine
running.
5-3.
A3 WIRING HARNESS
1. Turn master switch on. Check four wire regulator harness at the end that connects to the regulator.
You should get the following readings:
Pin A
Not used
Pin B
Circuit number 1
Battery voltage
Pin C
Circuit number 2
Battery voltage
Pin D
Circuit number 2A
Battery voltage
Pin E
Circuit number 1A
0 volts
Pin F
Not used
Pin G
Not used
2. Turn master switch on. Check three wire regulator harness at the end that connects to the regulator.
You should get the following readings:
Pin A
Circuit number 2A
Battery voltage
Pin B
Not used
Pin C
Circuit number 2
Battery voltage
Pin D
Not used
Pin E
Not used
Pin F
Circuit number 1B
0 volts
3. Turn master switch on. Check accessory harness at the end. You should get the following readings:
Pin A
Not used
Pin B
Circuit number 1B
0 volts
Pin C
Circuit number 406
Battery voltage (with air box heater switch on.)
Pin D
Circuit number 34
Battery voltage
Pin E
Circuit number 33
14 volts
Pin F
Circuit number 1C
Battery voltage
Pin G
Circuit number 327
Battery voltage
Pin H
Circuit number 74
Battery voltage
Pin J
Not used
Pin K
Circuit Number 406A
0 volts
Pin L
Not used
Pin M
Not used
Pin N
Not used
Pin O
Not used
4. Turn master switch on. Check starter harness at the end. You should get the following readings:
Pin A
Not used
Pin B
Circuit number 6A
Battery voltage
Pin C
Not used
Pin D
Not used
Pin E
Circuit number 6
Battery voltage
5-3
