139
2. Connect the red tester lead to one terminal spade;
then connect the black tester lead to the other termi-
nal spade.
HDX272
3. When the lever is depressed, the meter must show
less than 1 ohm.
NOTE: If the meter shows more than 1 ohm of resis-
tance, replace the switch.
VOLTAGE (Headlight)
1. Connect the red meter lead to the gray wire; then
connect the black meter lead to the black wire.
2. Turn the ignition switch to the ON position. The
meter must show battery voltage.
NOTE: If the meter does not show battery voltage,
troubleshoot the LIGHTS fuse on the power distribu-
tion module, the ignition switch, or the main harness.
3. Connect the red meter lead to the yellow wire; then
select the high beam position on the headlight
switch. The meter must show battery voltage.
4. Connect the red meter lead to either of the two white
wires; then select the low beam position on the head-
light switch. The meter must show battery voltage.
NOTE: The battery voltage will show lower in steps
3 and 4 due to electrical loading of the headlights.
RESISTANCE (Drive Select)
1. Remove the switch assembly from the dash; then dis-
connect the harness from the switch.
NOTE: The switch can be removed from the dash
using a thin, flat pry bar or suitable putty knife. It is not
necessary to remove the dash to remove the switch.
2. Using an ohmmeter, the following readings must be
observed.
HDX273A
PR566A
VOLTAGE (Drive Select)
NOTE: Voltage tests must be made with the switch
and the actuator connected. The meter can be con-
nected at the actuator connector using a break-out
harness or MaxiClips. The front drive actuator must
be connected.
1. Connect the black tester lead to the black wire; then
turn the ignition switch to the ON position.
2. Select the DC Volts position on the tester and
observe the meter readings for each of the three
switch positions.
NOTE: If the meter does not show voltages accord-
ing to the chart, make sure the front drive actuator is
plugged in; then troubleshoot the switch, ignition
fuses, battery connections, or wiring harness.
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
500
2WD
4WD
A to B Open
A to B <1 Ohm
700
2WD
4WD
DIFFERENTIAL LOCK
A to D <1 ohm
A to D <1 ohm
A to D <1 ohm
C to E 48 ohms
C to E 48 ohms
C to E 48 ohms
A to B Open
A to B <1 ohm
A to B <1 ohm
A to C Open
A to C Open
A to C 48 ohms
A to E Open
A to E Open
A to C <1 ohm
WIRE COLOR
2WD
4WD
DIFFERENTIAL LOCK
Red to Orange 12.0 DC Volts 12.0 DC Volts
12.0 DC Volts
Red to White/
Green
11.5 DC Volts
0 DC Volts
0 DC Volts
Red to White/
Red
11.5 DC Volts 11.5 DC Volts
0 DC Volts
500
700
Содержание HDX 500 2017
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