DESCRIPTION
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 5A-5
Testing Procedure
5. When a test light is specified, a low-power test light must be used. DO NOT use a
high-wattage test light. While a particular brand of test light is not suggested, a simple
test, as shown below, on any test light will ensure it to be safe for system circuit testing:
a. Connect an accurate ammeter (such as the high impedance digital multimeter) in
series with the test light being tested, and power the test light/ammeter circuit with
the battery.
b. If the ammeter indicates LESS than 3/10 amp current flow (.3 A or 300 mA), the test
light is SAFE to use.
c. If the ammeter indicates MORE than 3/10 amp current flow (.3 A or 300 mA), the test
light is NOT SAFE to use.
a
b
c
f-Amp Meter
g-Test Light
h-12 Volt Battery
NOTE: Using a test light with 100 mA or less rating may show a faint glow when test actually
states no light.
6. When using a DVOM to perform voltage measurements, turn the ignition OFF when
connecting the DVOM to the circuitry to be tested.