5-2
Battery
For battery related information, see Section 2.
Testing Electrical
Components
All of the electrical tests should be made using the
Fluke Model 73 Multimeter (p/n 0644-191) and when
testing peak voltage, the Peak Voltage Reading
Adapter (p/n 0644-307) must be used. If any other type
of meter is used, readings may vary due to internal cir-
cuitry. When troubleshooting a specific component,
always verify first that the fuse(s) are good, that the
bulb(s) are good, that the connections are clean and
tight, that the battery is fully charged, and that all
appropriate switches are activated.
NOTE: For absolute accuracy, all tests should
be made at room temperature of 68° F.
Accessory
Receptacle/Connector
NOTE: This test procedure is for either the
receptacle or the connector.
VOLTAGE
1. Turn the ignition switch to the ON position; then
set the meter selector to the DC Voltage position.
2. Connect the red tester lead to the red/white wire or
the positive connector; then connect the black
tester lead to ground.
3. The meter must show battery voltage.
NOTE: If the meter shows no battery voltage,
troubleshoot the battery, fuse, receptacle, connec-
tor, or the main wiring harness.
Brakelight Switch
(Auxiliary)
The switch connector is the two-prong connector on
the brake switch lead above the transmission.
NOTE: The ignition switch must be in the ON
position.
VOLTAGE (Wiring Harness Side)
1. Set the meter selector to the DC Voltage position.
2. Connect the red tester to the orange wire; then
connect the black tester lead to ground.
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3. The meter must show battery voltage.
NOTE: If the meter shows no battery voltage,
troubleshoot 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 harness for resistance.
RESISTANCE
(Switch Connector)
1. Set the meter selector to the OHMS position.
2. Connect the red tester lead to one black wire; then
connect the black tester lead to the other black
wire.
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3. When the brake pedal is depressed, the meter must
show less than 1 ohm.
! CAUTION
Always disconnect the battery when performing
resistance tests to avoid damaging the multimeter.
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