TM 5-2420-231-23-1
0043
Table 1. Display and/or Backup Alarm Does Not Turn On - Continued.
043
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Using a digital multimeter, mea-
Display and/or Backup
Resistance 5.0 Ohms or Less -
sure resistance between front con-
Remove jumper wire from main chassis
Alarm Does Not Turn On -
sole wiring harness connector (WP
wiring harness connector (WP 0007,
Continued
0007, Figure 105) terminal 87 and
Figure 97) terminal A and machine
machine ground. Resistance
ground.
should be 5.0 ohms or less.
Connect main chassis wiring harness
connector (WP 0007, Figure 97) to
backup alarm wiring harness connector
(WP 0007, Figure 98) (WP 0186).
Replace reverse relay (WP 0007,
Figure 106).
Proceed to Test Step 30.
Resistance Greater Than 5.0 Ohms -
Proceed to Test Step 9.
Test Step 9. Check for Open Circuit
in Main Chassis Wiring Harness.
1. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 5) from main chassis wiring
harness connector (WP 0007, Fig-
ure 6).
2. With an assistant, connect a
jumper wire between main chas-
sis wiring harness connector (WP
0007, Figure 97) terminal A and
machine ground.
3. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between main
Replace front console wiring harness
chassis wiring harness connector
(WP 0162).
(WP 0007, Figure 6) terminal 3D
Remove jumper wire from main chassis
and machine ground. Resistance
wiring harness connector (WP 0007,
should be 5.0 ohms or less.
Figure 97) terminal A and machine
ground.
Connect main chassis wiring harness
connector (WP 0007, Figure 97) to
backup alarm connector (WP 0007,
Figure 98) (WP 0186).
Proceed to Test Step 30.
Resistance Greater Than 5.0 Ohms -
Replace main chassis wiring harness
(WP 0154).
Proceed to Test Step 30.
Test Step 10. Test for Power at
Shuttle Interlock Timing Relay.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
0043-7