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6Y-14 ENGINE ELECTRICAL
Figure 9-Ohmmeter Check of Ignition Coil
Proceed to step 6 . A steady in
of the
red "REPLACE" light means that either the
pick-up coil or the HEI module is defective .
MODULE HARNESS CONNECTOR
3 WAY CONNECTOR
JUMPER
(STEP 4)
BATTERY LEAD CLIPS
CONNECTED TO BATTERY TERMINALS
Figure 10-Test No. 2, Using Tool J-24642
Check the HEI module with TEST 2 and check
the pick-up coil with Ohmmeter (see chart on
diagnosing the HEI system, figure 14).
NOTE:: A tester check is complete within a
few seconds . Prolonged holding
of
the
"TEST" button in excess of 15 seconds will
cause the module and/or the resistor to heat
and may produce erratic test results or
damage to the resistor, module or tester .
6. If pick-up coil and module test good,
remove distributor cap and coil assembly by
turning four latches .
7. Check primary of ignition coil in cap for
continuity with an Ohmmeter .
(Refer to
figure 9, step 1.) Reading should be zero or
near zero . If not, replace ignition coil . After
coil is replaced, proceed to steps 10 and 11.
8. Check secondary of coil (figure 9, step
2 .)
Use high scale. Reading should not be
infinite .
If everything checks good to this
point, the HEI system is good .
9. If reading is infinite, check cap and rotor
button for arced or burned condition .
If
necessary, replace cap. If cap and carbon
button
do
not appear
defective,
replace
ignition coil .
After ignition coil is replaced,
proceed with steps 10 and 11 .
10 . Continue module check by connecting e
voltmeter to the two way connector, the red
lead to the positive (+) terminal and the brown
lead to the negative (-) terminal . Select the
scale which best covers the 0-10 volt DC
range . The meter should read "zero" volts.
11 . Press and hold the "TEST" button . The
voltmeter should continue to read "zero" volts.
If the meter gives a voltage indication, the
module is defective and should be replaced.
Test 2 - MODULE IN VEHICLE, Distributor
Cap Removed (Engine runs Poorly) (Figure 10)
1. Perform steps 1 through 4
of
TEST 1 .
2. Disconnect green and white pick-up coil
leads from the HEI module and attach the,
green and white tester leads to the "G" and
"W" terminals of the module .
3 . Press and hold the "TEST" button . A
momentary indication on the red "REPLACE"
light, then a steady indication on the green
"GOOD" light means the HEI module is good.
A steady indication on the red "REPLACE"
light means that the module is defective and
should be replaced.
If the module is good,
check the pick-up coil (see chart-figure 14,
steps C-9 and C-10) .
4 . Check the ignition coil primary
for
con-
tinuity with an ohmmeter (figure 9, step 1) .
Reading should be zero or near zero.
If
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