Tracker Off-Road 800SX Service Manual page 116

MOD568
3. The meter must show battery voltage.
 NOTE: If the meter shows no battery voltage, trou-
bleshoot the battery, fuse, switch, or the main wiring
harness.
 NOTE: If the meter shows battery voltage, the main
wiring harness is good; proceed to test the switch/
component, the connector, and the switch wiring har-
ness for resistance.
Resistance
CAUTION
Always disconnect the battery when performing resis-
tance tests to avoid damaging the multimeter.
NOTE: There are two brake switches on the master

cylinder. The frontmost brake switch is a 12-volt DC
circuit switch and is connected to the front brakes.
The rearmost brake switch is a switch-to-ground cir-
cuit and is connected to the rear brakes.
 NOTE: The brake pedal must be depressed for this
test.
1. Set the meter selector to the OHMS position.
Remove the connectors from the switches.
2. Connect the red tester lead to one terminal spade;
then connect the black tester lead to the other termi-
nal spade.
MOD568A
3. When the lever is depressed, the meter must show
less than 1 ohm; then repeat for other brake switch.
NOTE: If the meter shows more than 1 ohm of resis-

tance, replace the switch.
114
DRIVE SELECT
Resistance
Component data can be retrieved using the Dealer Diag-
nostic System. Utilize the Sensor Data screen.
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. Set the meter selector to the OHMS position, the fol-
lowing readings must be observed.
MOD486
2WD/4WD Switch
2WD
2 to 3 Open
MOD486
REAR UNLOCK/LOCK Switch
UNLOCK
2 to 3 Open
Voltage
 NOTE: Voltage tests must be made with the
switches and the actuator connected. The meter can
be connected 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.
4WD
2 to 3 <1 ohm
LOCK
2 to 3 <1 ohm