TM 5-2420-231-23-1
0039
Table 1. Alarm Signal Does Not Function - Continued.
039
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Alarm Signal Does Not
Test Step 4. Check for Open Front
Function - Continued
Console Wiring Harness.
1. Connect light control switch (WP
0007, Figure 72) to front console
wiring harness connector (WP
0007, Figure 71).
2. Remove instrument panel front
cover (WP 0174).
3. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 5) from front main chassis wir-
ing harness connector (WP 0007,
Figure 6).
4. Using a digital multimeter, mea-
Resistance 25 to 35 Ohms - Replace
sure resistance between front
front console wiring harness (WP
main chassis wiring harness con-
0162).
nector (WP 0007, Figure 5) termi-
Proceed to Test Step 9.
nal 7C and machine ground.
Resistance Greater Than 35 Ohms -
Resistance should be 25 to 35
Proceed to Test Step 5.
ohms.
Resistance Less Than 25 Ohms -
Replace side console alarm (WP 0173).
Proceed to Test Step 9.
Test Step 5. Check for Open Circuit
in Main Chassis Wiring Harness.
1. Remove front instrument panel
right-side cover (WP 0176).
2. Disconnect rear main chassis wir-
ing harness connector (WP 0007,
Figure 25) from side console wir-
ing harness connector (WP 0007,
Figure 24).
3. Using a digital multimeter, mea-
Resistance 5.0 Ohms - Proceed to
sure resistance between rear main
Test Step 6.
chassis wiring harness connector
Resistance Greater Than 5.0 Ohms -
(WP 0007, Figure 25) terminal 7D
Replace main chassis wiring harness
and front main chassis wiring har-
(WP 0154).
ness connector (WP 0007, Figure
Proceed to Test Step 9.
6) terminal 7C. Resistance should
be 5.0 ohms or less.
Test Step 6. Test Alarm Supply
Circuit for an Open.
1. Disconnect side console wiring
harness connector (WP 0007, Fig-
ure 77) terminal A from alarm con-
nector (WP 0007, Figure 77)
terminal AA (WP 0173).
0039-4