Columbia ParCar P4G Service Manual page 233

Key switch in reverse, depress accelerator pedal. Voltmeter positive
red lead to white wire at #1 tab terminal of speed control module,
Voltmeter negative black lead to controller B- terminal.
Note: Lift white wire connector, but do not remove from #1 tab
terminal for testing.
Key switch in reverse, depress accelerator pedal. Voltmeter positive
red lead to #3 terminal reverse solenoid, Voltmeter negative black
lead to controller B- terminal.
Key switch in reverse, depress accelerator pedal. Voltmeter positive
red lead to #4 terminal forward solenoid, Voltmeter negative black
lead to controller B- terminal.
Key switch in reverse, depress accelerator pedal. Voltmeter positive
red lead to red wire at forward solenoid #3 terminal. Voltmeter nega-
tive black lead to controller B- terminal.
Key switch in reverse, depress accelerator pedal. Voltmeter positive
red lead to controller B+ terminal, Voltmeter negative black lead to
traction motor A-2 terminal.
Key switch in reverse, depress accelerator pedal completely.
Voltmeter positive red lead to controller B+ terminal, Voltmeter
negative black lead to controller M- terminal.
Key switch in reverse, depress accelerator pedal completely.
Voltmeter positive red lead to controller B+ terminal. Voltmeter nega-
tive black lead to #1 terminal reverse solenoid.
Key switch in reverse, depress accelerator pedal completely.
Voltmeter positive red lead to controller B+ terminal, Voltmeter nega-
tive black lead to #2 terminal reverse solenoid.
Key switch in reverse, depress accelerator pedal completely.
Voltmeter positive red lead to controller B+ terminal, Voltmeter nega-
tive black lead to traction motor A-1 terminal.
Full battery
voltage = Good
Full battery
voltage = Good
Full battery
voltage = Good
Full battery
voltage = Good
Full battery
voltage = Good
As accelerator is
depressed, volt-
age should rise
to within 1 to 2
volts of full bat-
tery voltage =
Good
Within 1 to 2
volts of full
battery voltage =
Good
Within 1 to 2
volts of full
battery voltage =
Good
Within 1 to 2
volts of full bat-
tery voltage =
Good
8-48
Less than full battery voltage,
diodes between forward &
reverse solenoids.
Less than full battery voltage,
low batteries, poor connection
from main solenoid to reverse
#3.
Less than battery voltage,
check connections from reverse
solenoid #3 terminal to sensor
module and to forward #4
terminal.
Less than full battery voltage,
replace defective forward
solenoid.
Less than full battery voltage,
check connections from forward
solenoid #1 to forward #3, and
to motor A-2.
No voltage, or less than within
2 volts of battery voltage, see
page 8-38 for Speed Switch
Testing. If speed switch is good,
controller is defective.
Less than full battery voltage,
check connections from con-
troller M-, to sensor module to
reverse solenoid.
Less than full battery voltage,
replace defective forward
solenoid.
Less than full battery voltage,
check connections from reverse
solenoid #2 to forward #4 and
to motor A-1.