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Page Title: Test Step 6. Connect the ET Directly to the ECM
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166
TM 9-2320-312-24-2
Troubleshooting Section
Results:
Yes The ECM is currently receiving the correct
voltage. Proceed to Test Step 6.
No The ECM is not receiving the correct
voltage. Ensure that there is not an aftermarket
engine protection switch that is overriding battery
power to the ECM.
Repair: Perform the following diagnostic
procedure:
Troubleshooting, "Ignition Key Switch Circuit and
Battery Supply Circuit - Test"
STOP.
Test Step 6. Connect the ET Directly to
the ECM.
g00741090
Illustration 40
NOTICE
Do Not connect the bypass harness to the battery un-
Batteries give off flammable fumes which can ex-
til the 20 Amp in-line fuse has been removed from the
plode.
+battery line. If the fuse is not removed before con-
nection to the battery a spark may result.
To avoid injury or death, do not strike a match,
cause a spark, or smoke in the vicinity of a battery.
A. Turn the ignition key switch to the ON position.

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