Urrea UD226 Manual De Usuario Y Garantía página 50

E N G L I S H
wires found on the engine to insure the
accuracy of the test.
NOTE: Be sure the test probe tips make
contact with the center conductor of the
wire.
Primary Windings Resistance Test
This test checks for resistance in the
primary windings of conventional and DIS
(distributorless) ignition coils.
To measure resistance in the primary
windings:
• Set the rotary switch to resistance (Ω).
• Disconnect the coil from the ignition
system.
Insert:
• Black lead in COM jack.
• Red lead in RPM,V, Ω jack.
Connect:
• Black test probe to the negative (–)
terminal on the coil.
• Red test probe to the positive (+) terminal
on the coil.
50
RED (+)
BLACK (+)
CONVENTIONAL
IGNITION COIL
RED (+)
BLACK (+)
NOTE:
Both primaries of type II are located on the
back of the coil.
For accurate low resistance measurements,
the resistance in test leads must be
subtracted from the total resistance
measured.
Typical measurements are between 0.5
ohms and 2.0 ohms. To get the actual
figures for a specific coil, check the
manufacturer's specs.
Don't forget: Test the ignition coil when it
is hot, and again when it is cold.
Secondary Windings Resistance Test
This test checks for resistance in the
secondary windings of conventional and
DIS (distributorless) ignition coils.
To measure resistance in the secondary
windings:
• Set the rotary switch to resistance (Ω).
• Disconnect the coil from the ignition
system.
Insert:
• Black lead in COM jack.
• Red lead in RPM, V, Ω jack.
GM DIS
IGNITION
COIL
(TYPE II)
RED (+)
BLACK (+)