Navistar International DT 466 Diagnostic/Troubleshooting Manual page 205

Figure 258 Ground terminal (left side of
crankcase)
1. Connect DMM negative lead to the ground
terminal, on the left side of crankcase or known,
good ground in the cab.
Figure 259 Relay terminal
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
5 HARD START AND NO START DIAGNOSTICS
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
NOTE: Engines could be wired differently, having
wiring harness connectors secured to different relay
terminals. Trace wiring harness from battery to the
relay, to be sure that the correct relay terminal is
being tested.
2. Contact DMM positive lead to relay terminal of
battery feed to relay.
3. Record results on Diagnostic Form.
• If DMM voltage at relay terminal is B+,
continue with step 4 and measure relay
output to element.
• If voltage of relay terminal is less than B+,
repair or replace wire from starter to relay.
Retest to verify repair.
4. Turn the ignition switch to ON.
5. Contact DMM positive lead to relay output
terminal, relay to element.
Figure 260 Glow Plug/Inlet Air Heater Output
State Test
6. Select Diagnostics from the menu bar.
7. Select Key-On Engine-Off Tests from the drop
down menu.
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