4-108. DIESEL GLOW PLUG SYSTEM MAINTENANCE.
This task covers:
INITIAL SETUP :
Glow Plug (5613738)
General Safety Instructions
12 Volt Test Light
Transmission in (N) neutral.
General Mechanics Tool Kit
Parking brake and micro-brakelock set.
Disconnect the plug (1) from the wire
Unscrew the plug (1).
Check the glow plugs (1).
Check all connectors in the glow plug
Check the engine harness ground connection
to engine and torque the nut to 8 ft-lbs (11 N-
Check the glow plug lamp on the instrument
panel for tight connection and operation.
Check the four-wire connector at controller to
be sure it is fully seated and latched.
Check both controller copper stud upper nuts
A normal functioning system operates as follows:
and be sure they are torqued to 48 in-lbs (5
Key on - Engine not running and at ambient
(1) Glow plugs ON for 4 to 6 seconds, then
OFF for about 4.5 seconds.
Do not tighten lower nuts.
(2) Then cycle; ON for about 1. 5 seconds,
Check the temperature switch connectors at
OFF for about 4.
5 seconds, and
continue to cycle 1. 5 ON/4. 5 OFF, for
a total duration (including the initial 4 to 6
seconds) of about 20 seconds.