Perkins NJ Series Troubleshooting Manual page 186

186 SENR9982-01
Troubleshooting Section
Test Step 5. Bypass the Application
Harness
Batteries give off flammable fumes which can ex-
plode.
To avoid injury or death, do not strike a match,
cause a spark, or smoke in the vicinity of a battery.
NOTICE
Do Not connect the bypass harness to the battery un-
til all of the in-line fuses have been removed from the
+Battery line. If the fuses are not removed before con-
nection to the battery a spark may result.
Note: This bypass harness is only for test
applications. This bypass harness must be removed
before the application is released to the customer.
The bypass harness can be used in order to
determine if the cause of the intermittent faults are
interruptions in battery power to the ECM or to the
keyswitch circuit.
g01245124
Illustration 74
Schematic for the bypass application harness
A. Turn the keyswitch to the OFF position. C. Connect a bypass harness to the ECM.
B. Disconnect the P1 connector from the ECM
connector.