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 9.
Disconnect side console wiring
Gauge Indicates High
harness connector (WP 0007, Fig-
Temperature, Does Not
ure 24) from rear main chassis wir-
Function, or Is Inaccurate -
ing harness connector (WP 0007,
Continued
Figure 25) (WP 0170).
10. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between side con-
Proceed to step 11.
sole wiring harness connector (WP
Resistance Greater Than 5.0 Ohms -
0007, Figure 28) terminal 22 and
Replace side console wiring harness
side console wiring harness con-
(WP 0170).
nector (WP 0007, Figure 24) termi-
Proceed to Test Step 9.
nal 1H. Resistance should be 5.0
ohms or less.
11. Connect coolant temperature
sender eyelet (WP 0007, Figure
32) to machine ground.
12. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between side con-
Replace instrument cluster (WP 0177).
sole wiring harness connector (WP
Connect all wiring harness connectors
0007, Figure 24) terminal 1H and
and install front instrument panel right-
machine ground.
side cover (WP 0176).
Proceed to Test Step 9.
Resistance Greater Than 5.0 Ohms -
Replace main chassis wiring harness
(WP 0154).
Proceed to Test Step 9.
Test Step 8. Test Coolant
Temperature Sending Unit and
Signal Circuit for a Short to Ground.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Remove locknut (Figure 20,
Item 1) from coolant temperature
sender (Figure 20, Item 2) and
remove wiring harness connector
(Figure 20, Item 3) from coolant
temperature sender (Figure 20,
Item 2).
0021-26