TM 5-2420-231-23-1
0021
Table 1. Engine Coolant Temperature Gauge Indicates High Temperature,
Does Not Function, or Is Inaccurate - Continued.
021
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Engine Coolant Temperature 7.
Using a digital multimeter, test for
Continuity - Proceed to step 8.
Gauge Indicates High
continuity between side console
No Continuity - Replace instrument
Temperature, Does Not
wiring harness connector (WP
cluster (WP 0177).
Function, or Is Inaccurate -
0007, Figure 28) terminal 22 and
Connect all wiring harness connectors.
Continued
machine ground. There should be
Proceed to Test Step 9.
no continuity.
8. Remove front instrument panel
right-side cover (WP 0176).
9. Disconnect side console wiring
harness connector (WP 0007, Fig-
ure 24) from rear main chassis wir-
ing harness connector (WP 0007,
Figure 25) (WP 0170).
10. Using a digital multimeter, test for
Continuity - Replace main chassis
continuity between rear main chas-
wiring harness (WP 0154).
sis wiring harness connector
Proceed to Test Step 9.
(WP 0007, Figure 25) terminal 1H
No Continuity - Replace coolant
machine ground. There should be
temperature sender (WP 0131).
no continuity.
Connect rear main chassis wiring
harness (WP 0007, Figure 25) to side
console wiring harness (WP 0007,
Figure 24) (WP 0170).
Install the front instrument panel right-
side cover (WP 0176).
Proceed to Test Step 9.
Test Step 9. Verify That Symptom Is
Resolved.
1. Connect all wiring harness con-
nectors.
2. Start and operate engine (TM 5-
2420-231-10) for approximately 10
minutes.
CAUTION
Do not allow engine to become overheated during this procedure. If
coolant temperature gauge indicates high engine coolant temperature,
turn ignition switch off immediately, or damage may result.
3. Monitor and record engine coolant
Engine Coolant Temperature Gauge
Reading Is OK - Troubleshooting
temperature (TM 5-2420-231-10).
complete.
Engine Coolant Temperature Gauge
Indicates High Coolant Temperature
- Repeat troubleshooting from the
beginning.
END OF WORK PACKAGE
0021-29/(30 blank)