Electrical Connectors - Inspect - Perkins 1106D Troubleshooting Manual

SENR9982

Electrical Connectors - Inspect

System Operation Description:
Most electrical faults are caused by poor connections.
The following procedure will assist in detecting
faults with connectors and with wiring. If a fault is
found correct the condition and verify that the fault
is resolved.
Intermittent electrical faults are sometimes resolved
by disconnecting and reconnecting connectors.
It is very important to check for diagnostic codes
immediately before disconnecting a connector.
Also check for diagnostic codes after reconnecting
the connector. If the status of a diagnostic code is
changed due to disconnecting and reconnecting a
connector, there are several possible reasons. The
likely reasons are loose terminals, improperly crimped
terminals, moisture, corrosion, and inadequate
mating of a connection.
Follow these guidelines:
• Always use a CH11155 Crimp Tool to service
Deutsch HD and DT connectors. Never solder the
terminals onto the wires.
• Always use a 28170079 Removal Tool to
remove wedges from DT connectors. Never use a
screwdriver to pry a wedge from a connector.
• Always use a CH11155 Crimp Tool to service AMP
seal connectors.
•
Refer to Troubleshooting, "ECM Harness
Connector Terminals" in order to service the
connectors for the Electronic Control Module
(ECM).
•
Always use a breakout harness for a voltmeter
probe or a test light. Never break the insulation of a
wire in order to access a circuit for measurements.
•
If a wire is cut, always install a new terminal for
the repair.
The connection of any electrical equipment and
the disconnection of any electrical equipment may
cause an explosion hazard which may result in in-
jury or death. Do not connect any electrical equip-
ment or disconnect any electrical equipment in an
explosive atmosphere.
Test Step 1. Check Connectors for
i02411206
Moisture and Corrosion
Illustration 39
Leaky seal at the connector (typical example)
A. Inspect all the harnesses. Ensure that the routing
of the wiring harness allows the wires to enter the
face of each connector at a perpendicular angle.
Otherwise, the wire will deform the seal bore.
Refer to Illustration 39. This will create a path for
the entrance of moisture. Verify that the seals for
the wires are sealing correctly.
Illustration 40
Diagram for the installation of a connector plug (typical example)
(1) ECM connector
(2) Correctly inserted plug
(3) Incorrectly inserted plug
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Troubleshooting Section
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