5.0/5.7/6.0L/8.1L General Information 1 - 7
MEFI 4 - PCM
VOLTMETER - Voltage position measures magnitude of
voltage when connected in parallel to an existing circuit.
A digital voltmeter with a 10 megohm input impedance
is used because this type of meter will not load down
the circuit and result in faulty readings. Some circuits
require accurate low voltage readings because they have
a very high resistance.
AMMETER - When used as an ammeter, this meter
accurately measures extremely low current fl ow. Refer to
meter instructions for more information.
• Selector must be set properly for both function and
range. DC is used for most measurements.
OHMMETER - Measures resistance of circuit directly in
ohms. Refer to meter instructions for more information.
• OL display in all ranges indicates open circuit.
• Zero display in all ranges indicates a short circuit.
• An intermittent connection in a circuit may be indicated
by a digital reading that will not stabilize on the
circuit.
• Range Switch - Automatic and Manual.
200ý - Reads ohms directly
2K, 20K, 200Ký - Reads ohms in thousands
2M, 20M, 200Mý - Reads ohms in millions
VACUUM PUMP WITH GAUGE (20 IN. HG. MINIMUM)
Use the gauge to monitor manifold engine vacuum and
use the hand pump to check vacuum sensors, solenoids
and valves.
UNPOWERED TEST LIGHT
Used for checking wiring for a complete circuit, voltages
and grounds.
TACHOMETER
Must have inductive trigger signal pick-up.
➤
TACHOMETER
3
5
0
2
1
4
J 34142-B
J 39978
J 23738-A
Special Tools (1 of 3)
0
1234
5678 90
4000
mV
AUTO 100
ms
RECORD MAX MIN AVG
AC DC
µ
m V A
n F S %
M k Ω Hz
87
TRUE RMS MULTIMETER
400mA MAX
FUSED
10A MAX
FUSED
_
…
mV
V
V
Ω
~
_
…
OFF
µ
A
~
_
…
~
_
…
A
mA
(
NS 14574
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